2013.11 ~ 2013.12    Visiting Researcher, Austrialian Center for Microscopy and Microanalysis, The University of Sydney

2016.04 ~ 2016.05   Visiting Scientist, Chen Laboratory , Tohoku University 

2016.06 ~ 2019.08   Posdoctoral Researcher, Research Center for Magnetic and Spintronic Materials, National Institute for Materials

2019.09 ~ Present   Professor, College of Materials Science and Engineering, Hunan Univerisity

Postdoctoral recruitment （ポスドク研究員募集中）

1. Job Requirements　

(1)            Possess a research background in physics, materials, electricity, instrumentation, etc.;

(2)            Obtain a doctorate within 3 years;

(3)            Possess good scientific research potential, academic ethics and comprehensive ability;

(4)            Engage in full-time research work at the school.

2. Remuneration

(1) Special subsidy category: The school allocates personnel funds according to the standard of 500,000 yuan/year + tutor supporting funds of 30,000-80,000 yuan/year + 1,800 yuan/month rent subsidy.

(2) Key subsidy categories: The school allocates personnel funds based on the standard of 200,000 yuan/year + tutor supporting funds of 30,000-80,000 yuan/year + 1,800 yuan/month rent subsidy.

(3) International joint training category: The school allocates personnel funds according to the standard of 200,000 per year (including state funding) + supporting funds for tutors of 30,000-80,000 per year + funds for foreign research groups.

(4) General subsidy category: The school allocates personnel funds according to the standard of 120,000 yuan/year + tutor supporting funds of 30,000-80,000 yuan/year + 1,800 yuan/month rent subsidy.

3. Support guarantee

(1) Enjoy Changsha talent subsidies according to policies (including living subsidies and house purchase subsidies of 130,000 to 200,000 yuan).

(2) The school calculates the working years during the station, and the working time of postdoctoral personnel who have no work experience before entering the station is counted from the date of entering the station.

(3) Postdoctoral fellows will be rated as assistant research fellows upon entering the station, and the indicators for postdoctoral associate research fellows will be listed separately.

(4) The school specially sets up the "Outstanding Postdoctoral" award. After leaving the station, the selected candidates can apply for career establishment teaching and research positions.

(5) Enjoy the same rewards for scientific research achievements as the teachers of the school. During the station period, you can settle in our school, and your children can enjoy the treatment of children of our school's faculty and staff in nursery and school admission.

(6) Assist in applying for the "Postdoctoral Innovative Talent Support Program", "Postdoctoral International Exchange Program" and various research funds.

4. Development prospects

(1) The research group will provide competitive remuneration and first-class scientific research conditions and environment

(2) Encourage and fully support postdoctoral applicants for postdoctoral innovative talent support programs, postdoctoral funds, National Natural Science Foundation of China and other projects.

(3) Recommend further study or employment according to personal wishes. Those with particularly outstanding performance during the postdoctoral period can be hired as teaching and scientific research positions (associate professors, professors) and other positions within the staff.

5. Application process

(1) Candidates should send their resumes and representative achievement materials to the contact email address of the research group, xiandongxu@hnu.edu.cn. Please indicate "postdoctoral candidate + name" in the subject of the email. After confirming the cooperative relationship, contact the college to prepare to submit materials.

(2) Please refer to the website http://postdoctor.hnu.edu.cn for the recruitment process and material requirements. 

(3) Hunan University is located in Changsha, a famous historical and cultural city in China. The campus is located on the shore of the Xiangjiang River and at the foot of Yuelu Mountain. The school originated from Yuelu Academy, which was founded in 976 AD. It has a long history and excellent educational traditions. It enjoys the reputation of "a thousand-year school, a century-old famous school". , National "world-class university" construction colleges and universities. The school has a graduate school and 27 colleges, and its disciplines cover 11 categories including philosophy, economics, law, education, literature, history, science, engineering, management, medicine, and art.

6. Get to know Changsha

(1) The provincial capital of Hunan Province was selected as one of the first batch of famous historical and cultural cities in China. It is a state city with green hills as its screen, clear water piercing through the city, and a beautiful environment.

(2) Form seven hundred-billion-level industrial clusters, including construction machinery, food, new materials, electronic information, cultural creativity, tourism, automobiles, and parts and components.

(3) In 2020, the GDP of Hunan Province will rank 9th in the country, and the economic aggregate of Changsha will be "trillions". The per capita disposable income of urban and rural residents will rank first in the central cities. 9843/㎡ yuan.

(4) It is located at the intersection of Beijing-Guangzhou, Shanghai-Kunming, and Chongqing-Changsha high-speed railways. The high-speed railway directly connects 23 provincial capitals and municipalities directly under the central government; it integrates subway, maglev, urban railway, and aviation-high-speed rail combined transport three-dimensional transportation. It is an important comprehensive complex in the country. transportation hub

(5) Awarded "China's Happiest City" for thirteen consecutive years.

　　　　　　       ポスドク研究員募集中

1. Electron/Ion microscopy and their applications to materials science

2. Magnetic materials (soft/hard/magnetostrictive materials)

3. Metallic functional materials (solid solution alloys for medical, high-temperature, marine, precision-instrument applications)

4. Instrumentation based on electron/ion microscopy
   

【Publication】    

To keep track of our latest publications, please refer to the google scholar (click here)  

【Publication】 

  *Corresponding author   

（一）Advanced (magnetic) functional materials

22. X.D. Xu, Z.X. Chen, Y. Sakuraba*, A. Perumal, K. Masuda, L.S.R. Kumara, H. Tajiri, T. Nakatani, J. Wang, W. Zhou, Y. Miura, T. Ohkubo, K. Hono, Microstructure, magnetic and transport properties of a Mn₂CoAl Heusler compound, Acta Materialia 2019, 176:33-42. 

21. X.D. Xu, T.T. Sasaki* , H. Sepehri-Amin, M. Soderžnik , X. Tang, T. Ohkubo, K. Hono, Comparison of coercivity and squareness in hot deformed and sintered magnets produced from a Nd-Fe-B-Cu-Ga alloy, Scripta Materialia 2019, 160:9-14.

20. X.D. Xu, Z.J. Dong, T.T. Sasaki*,Xin Tang, H. Sepehri-Amin, T. Ohkubo, K. Hono, Influence of Ti addition on microstructure and magnetic properties of a heavy-rare-earth-free Nd-Fe-B sintered magnet, Journal of Alloys and Compounds 2019, 806: 1267-1275. 

19. X.D. Xu, T.T. Sasaki*, Y. Une, H. Kubo, T. Ohkubo, M. Sagawa, K. Hono, Origin of the coercivity difference in Nd-Fe-B sintered magnets processed from hydrogenation-disproportionation-desorption- recombination powder and jet-milled powder, Acta Materialia 2018, 151: 293-300. 

18. X.D. Xu, T.T. Sasaki*, J.N. Li, Z.J. Dong, H. Sepehri Amin, T.H. Kim, T. Ohkubo, T. Schrefl, K. Hono, Microstructure of a Dy-free Nd-Fe-B sintered magnet with 2 T coercivity, Acta Materialia 2018, 156: 46-157. 

17. X.D. Xu, K. Mukayama, S. Kasai*, T. Ohkubo, K. Hono, Impact of boron diffusion at MgO grain boundaries on magneto-transport properties of MgO/CoFeB/W magnetic tunnel junctions, Acta Materialia 2018, 161:360-366. 

16. D. Ogawa, X.D. Xu, Y.K. Takahashi, T. Ohkubo, S. Hirosawa, K. Hono，Emergence of coercivity in Sm(Fe0.8Co0.2)12 thin films via eutectic alloy grain boundary infiltration, Scripta Materialia 2019, 164:140-144.

15. S. Li, T. Nakatani, K. Masuda, Y. Sakuraba, X.D. Xu, T.T. Sasaki, H. Tajiri, Y. Miura, T. Furubayashi, K. Hono, Enhancement of current-perpendicular-to-plane giant magnetoresistive outputs by improving B2-order in polycrystalline Co₂(Mn_0.6Fe_0.4)Ge Heusler alloy films with the insertion of amorphous CoFeBTa underlayer, Acta Materialia 2018, 142:49-57.

14. S. Kurdi, Philipp. Zilske, X.D. Xu, M. Frentrup, M.E. Vickers, Y. Sakuraba, Günter Reiss, Z.H. Barber, J.W. Koo, Journal of Applied Physics 2020, 127:165302.

13. Z.D. Chi, Y.C. Lau, X.D. Xu, T. Ohkubo, K. Hono, M. Hayashi, The spin Hall effect of Bi-Sb alloys driven by thermally excited Dirac-like electrons, Science advances 2020, 6:eaay2324.

12. D. Ogawa, T. Yoshioka, X.D. Xu, Y.K. Takahashi, H. Tsuchiura, T. Ohkubo, S. Hirosawa, K. Hono, Magnetic anisotropy constants of ThMn12-type Sm (Fe_1–xCo_x) ₁₂ compounds and their temperature dependence, Journal of Magnetism and Magnetic Materials 2020, 497:165965.

11. P. Tozman, H. Sepehri-Amin, L.T. Zhang, J. Wang, X.D. Xu, K. Hono, An alternative approach to the measurement of anisotropy field–Single grain extraction, Journal of Magnetism and Magnetic Materials 2020, 494:165747.

10. Y. Jibiki, M. Goto, M. Tsujikawa, P. Risius, S. Hasebe, X.D. Xu, K. Nawaoka, T. Ohkubo, K. Hono, M. Shirai, S. Miwa, Y. Suzuki, Interface resonance in Fe/Pt/MgO multilayer structure with large voltage controlled magnetic anisotropy change, Applied Physics Letters 2019, 114:082405.

9. M. Kuhnt, X.D. Xu, M. Amalraj, P. Kozikowski, K.G.Pradeep, T. Ohkubo, M. Marsilius, T. Strache, C. Polak, M. Ohnuma, K. Hono, G. Herzer, The effect of Co addition on magnetic and structural properties of nanocrystalline (Fe,Co)-Si-B-P-Cu alloys, Journal of Alloys and Compounds 2018, 766:686-693.

8. A.K. Shukla, M. Goto, X.D. Xu, K. Nawaoka, J. Suwardy, T. Ohkubo, K. Hono, S. Miwa, Y. Suzuki, Voltage-Controlled Magnetic Anisotropy in Fe_1−xCo_x/Pd/MgO system, Scientific Report 2018, 8:10362.

7. I. Tiar, H. Sukegawa, X.D Xu, M. Belmoubarik, H. Lee, S. Kasai, K. Hono, Highly (001)-textured MgAl2O4-based magnetic tunnel junctions with large magnetoresistance over 240 %, 2018 IEEE International Magnetics Conference (INTERMAG), Singapore, 2018, 1-1.

6. Ikhtiar, H. Sukegawa, X.D. Xu, M. Belmoubarik, H. Lee, S. Kasai, K. Hono, Giant tunnel magnetoresistance in polycrystalline magnetic tunnel junctions with highly textured MgAl₂O₄(001) based barriers, Applied Physics Letters 2018, 112:022408 (Featured article).

5. T. Nozaki, A.K. Rachwał, M. Tsujikawa, Y. Shiota, X.D, Xu, T. Ohkubo, T. Tsukahara, S. Miwa, M. Suzuki, S. Tamaru, H. Kubota, A. Fukushima, K. Hōno, M. Shirai, Y. Suzuki, S. Yuasa, Highly efficient voltage control of spin and enhanced interfacial perpendicular magnetic anisotropy in iridium-doped Fe/MgO magnetic tunnel junctions, NPG Asia Materials 2017, 9:e451.

4. Y. Tanabe, Y. Ito, K. Sugawara, D. Hojo, M. Koshino, T. Fujita, T. Aida, X.D. Xu, K.K. Huynh, H. Shimotani, T. Adschiri, T. Takahashi, K. Tanigaki, H. Aoki, M.W. Chen, Electric properties of Dirac fermions captured into 3D nanoporous graphene networks, Advanced Materials 2016, 28:10304-10310.

3. L.Y. Chen, X.W. Guo, J.H. Han, P. Liu, X.D. Xu, A. Hirata, M.W. Chen, Nanoporous metal/oxide hybrid materials for rechargeable lithium–oxygen batteries, Journal of Materials Chemistry A 2015, 3650-3626.

2. Y. Iida, Q.Y. Xiang, J. Okabayashi, T. Scheike, X.D. Xu, K. Hono, H. Sukegawa, S. Mitani, Perpendicular magnetic anisotropy in W-inserted Fe/MgO interfaces studied by X-ray magnetic circular dichroism, Photon Factory Activity Report 2018 #36 (2019).

1. T. Scheike, H. Sukegawa, X.D. Xu, T. Ohkubo, K. Hono, S. Mitani, Large perpendicular magnetic anisotropy in sputter-deposited Fe_100-xAl_x/MgAl₂O₄ heterostructures, 日本磁気学会講演概要集 2018, 11pPS-30.

（二） Advanced structural materials

18. L.L. Han, T. Quan, B. Liu, X.D. Xu* & Yong Liu*, Revealing the excellent high-temperature oxidation resistance of a non-equimolar Al₁Co₂₅Cr₁₈Fe₂₃Ni₂₃Ta₁₀ compositional complex eutectic alloy, Journal of Alloys and Compounds 2020, 846;156265. 

17. L.L. Han, X.D. Xu*, Z.M. Li, B. Liu, C.T. Liu & Y. Liu*, A novel equiaxed eutectic high-entropy alloy with excellent mechanical properties at elevated temperatures, Materials Research Letter 2020, 8:373-382. 

16. Q. Cheng, X.D. Xu*, X.Q. Li*, Y.P. Li, T.G. Nieh & M.W. Chen*, Solid solution softening in a Al_0.1CoCrFeMnNi high-entropy alloy, Scripta Materialia 2020, 186: 63-68.

15. L.L. Han, X.D. Xu*, L. Wang, F. Pyczk, R. Zhou, Y. Liu*, A eutectic high-entropy alloy with good high-temperature strength-plasticity balance, Materials Research Letter 2019, 7:460-466. 

14. X.D. Xu, S. Guo, T.G. Nieh, C.T. Liu, A. Hirata, M.W. Chen*, Effects of mixing enthalpy and cooling rate on phase formation of Al_xCoCrCuFeNi high-entropy alloys, Materialia 2019, 6: 100292. 

13. X.D. Xu, S.Y. Chen, Y. Ren, A. Hirata, T. Fujita, P.K. Liaw, M.W. Chen*, Temperature-dependent compression behavior of an Al_0.5CoCrCuFeNi high-entropy alloy, Materialia 2019, 5:100243.

12. X.D. Xu, P. Liu, S.X. Song, T. Fujita, A. Hirata, T.G. Nieh, M.W. Chen*, Microstructural origins for a strong and ductile Al_0.1CoCrFeNi high-entropy alloy with ultrafine grains, Materialia 2018, 4:395-405. 

11. X.D. Xu，P. Liu，Z. Tang，A. Hirata，S.X. Song，T.G. Nieh，P.K. Liaw，C.T. Liu，M.W. Chen*, Transmission electron microscopy characterization of dislocation structure in a face-centered cubic high-entropy alloy Al_0.1CoCrFeNi, Acta Materialia 2018, 144:107-115. 

10. X.D. Xu, P. Liu, S. Guo, A. Hirata, T. Fujita, T.G. Nieh, C.T. Liu, M.W. Chen*, Nanoscale phase separation in a fcc-based CoCrCuFeNiAl_0.5 high-entropy alloy, Acta Materialia 2015, 84:145-152. 

9. J.Y. He, H. Wang, H.L. Huang, X.D. Xu, M.W. Chen, Y. Wu, X.J. Liu, T.G. Nieh, K. An, Z.P. Lu, A precipitation-hardened high-entropy alloy with outstanding tensile properties, Acta Materialia 2016, 102:187-196. 

8. H.K. Bian, X.D. Xu, Y.P. Li, Y. Koizumi, Z.C. Wang, M.W. Chen, K. Yamanaka, A. Chiba, Regulating the coarsening of the γ′ phase in superalloys, NPG Asia Materials 2015, 7:e212.

7. G. Song, Z.Q. Sun, L. Li, X.D. Xu, M. Rawlings, C.H. Liebscher, B. Clausen, J. Poplawsky, D.N. Leonard, S.Y. Huang, Z.K. Teng, C.T. Liu, M.D. Asta, Y.F. Gao, D.C. Dunand, G. Ghosh, M.W. Chen, M.E. Fine, P.K. Liaw, Scientific reports 2015, 5:1-14.

6. I. McCue, S. Ryan, K. Hemker, X.D. Xu, N. Li, M.W. Chen, J. Erlebacher, Size effects in the mechanical properties of bulk bicontinuous Ta/Cu nanocomposites made by liquid metal dealloying, Advanced Engineering Materials 2016, 18:46-50.

5. W. Zhou, L.M. Fu, P. Liu, X.D. Xu, B. Chen, G.Z. Zhu, X.D. Wang, A.D. Shan, M.W Chen, Deformation stimulated precipitation of a single-phase CoCrFeMnNi high entropy alloy, Intermetallics 2017, 85:90-97.

4. C.Y. Yu, X.D. Xu, M.W. Chen, C.T. Liu, Atomistic mechanism of nano-scale phase separation in fcc-based high entropy alloys, Journal of Alloys and Compounds 2016, 663:340-344.

3. F.L. Wang, Y.P. Li, X.D. Xu, Y. Koizumi, K. Yamanaka, H.K. Bian, A. Chiba, Superthermostability of nanoscale TIC-reinforced copper alloys manufactured by a two-step ball-milling process, Philosophical Magazine 2015, 95:4035-4053.

2. Y.P. Li, X.D. Xu, Y.H. Hou, C. Zhang, F.L. Wang, K. Omura, Y. Koizumi, A. Chiba, Regulating the passive film of NiCoCrMo alloy in hydrofluoric acid solution by small addition of Cu, Corrosion Science 2015, 98:119-127.

1. S.C. Ning, T. Fujita, A. Nie, Z.Q. Wang, X.D. Xu, J.H. Chen, M.W. Chen, S.H. Yao, T.Y. Zhang, Scanning distortion correction in STEM images, Ultramicrocopy 2018, 184:274-283.

【Conference】

12. X.D. Xu, T. Fujita, A. Hirata, M.W. Chen. Nano-scale phase separation in a single phase high entropy alloy. Gordon Research Conference, Hongkong China, July 20-25, 2014. Poster.

11. X.D. Xu, Y.R. Wen, T. Fujita, A. Hirata, M.W. Chen. Identification of 9R structure in a FeCu alloy, Japanese microscopy association, Japanese Female University, Dec 13,2013. Poster.

10. X.D. Xu, T. Fujita, A. Hirata, M.W. Chen. Dislocation structure in a plastically deformed FeCoCrNiAl0.1 high entropy alloy. Guiyang high entropy workshop. Guiyang China. Jan 5, 2014. Oral Presentation.

9. X.D.Xu, T. Sasaki, T. Ohkubo, K. Hono, Y. Une, H. Kubo, T. Mizokuchi, T. Iriyama, M. Sagawa. Microstructure analysis of Ga doped ultra-fine grained magnets fabricated by HDDR and press-less sintering, The Japan Institute for Metals and Materials, Tokyo Metropolitan University, 2017, Oral Presentation.

8. X.D. Xu, Z.J. Zhan, T. Sasaki, T.H. Kim, T. Ohkubo, K. Hono. Multiscale microstructure analysis of Dy-free high coercivity Nd-Fe-B sintered magnets. Elements Strategy Initiative Center for Magnetic Materials (ESICMM)-Open Symposium. 2017, Tsukuba, Japan.

7. X.D. Xu, Z.J. Zhan, T. Sasaki, T.H. Kim, T. Ohkubo, K. Hono. Microstructure analysis of a Ga-doped Nd-Fe-B magnet with 2T coercivity. 62^nd Annual Conference on Magnetism and Magnetic Materials, 2017 Pittsburgh, Oral Presentation.

6. T. Nakatani, S. Li, Y. Sakuraba, T.T. Sasaki, X.D. Xu, H. Tajiri, T. Furubayashi and K. Hono, Microscopic origins of enhanced output of Heusler alloy CPP-GMR readers by amorphous underlayer and conductive oxide spacer, poster TMRC Tsukuba 2017.

5. T. Nozaki, Y. Shiota, A. Koziol-Rachiwal, M. Tsujikawa, X.D. Xu, T. Ohkubo, T. Tsukahara, S. Miwa, M. Suzuki, S. Tamaru, H. Kubota, A. Fukushima, K. Hono, M. Shirai, Y. Suzuki, Recent progress in voltage-controlled magnetic anisotropy: towards the realization of voltage-torque MRAM, poster TMRC Tsukuba 2017.

4. T. Nozaki, Y. Shiota, A. Kozioł-Rachwał, M. Tsujikawa, T. Yamamoto, X.D. Xu, T. Ohkubo, T. Tsukahara, S. Miwa, M. Suzuki, S. Tamaru, H. Kubota, A. Fukushima, K. Hono, M. Shirai, Y. Suzuki, S. Yuasa, Recent progresses and future challenges in voltage-controlled magnetic anisotropy effect, 41^th Annual Conference on MAGNETICS in Japan, 2017.

3. K. Nakada, S. Ichikawa, X.D. Xu, H. Sukegawa, T. Ohkubo, K. Hono, S. Mitani, High quality spinel MgAl₂O₄ tunnel barrier grown by controlled reactive sputtering, MMM/INTERMAG 2019.

2. Z. Chen, X.D. Xu, Y. Sakuraba, W. Zhou, J. Wang, T. Nakatani, K. Hono, Analysis of microstructure and transport properties in Mn₂CoAl Heusler alloy, Magnetic Society of Japan 2018.

1. X.D. Xu, Z. Chen,Y. Sakuraba, W. Zhou, J. Wang, L.S.R. Kumara, H. Tajiri, T. Nakatani, K. Hono, Analysis of microstructure and transport properties in Mn₂CoAl Heusler alloy, The Japan Institute for Metals and Materials, Tokyo Denki University, 2019 Spring, Oral Presentation.

  Year 2012,   Fuji International Scholarship, Japan 

  Year 2014,   JAASO Scholarship, Japan 

  Year 2014,   Tohoku Kaihatsu Award, Japan 

  Year 2015,   President Award of Tohoku University, Japan 

  Year 2015,   Chinese Government Award for Outstanding Self-financed Students Abroad, China 

  Year 2019,   Yuelu Scholar of Hunan University, China 

  Year 2020,   A Hundred Talent Program of Hunan Province, China

  Year 2021,  Talent Cultivation Program of Hunan University

  Year 2022,  Hunan Natural Science Funds for Distinguished Young Scholar 

  Year 2022,  National Natural Science Foundation of China Youth Fund （overseas）

  Year 2022, Outstanding Contribution Award by the journal of Materials Research Letter