Abstract: The exchange bias effect refers to the phenomenon that the hysteresis loop of the material is shifted along the magnetic field axis after the material is cooled with or without the extra magnetic field. It has become an important theoretical basis for research on information storage technology, and plays an indispensable role in electronic devices such as electromagnetic sensors, magnetic read heads, and magnetic spin valves. Therefore, in recent years, researchers have attracted great attention and research. The exchange bias effect is widely present in nano-core@shell particles, multilayer film systems and bulk alloys.However, most of the exchange bias systems should be investigated at low temperature(T≤50 K),which limits the application of exchange bias effect. After years of exploration and research, the room temperature exchange bias effect has been obtained in some thin film systems, nano-core@shell particles, multilayer film systems and nearly-compensated ferrimagnetic systems. In this paper,the investigation of room temperature exchange bias effect in recent years is summarized in detail,and the existing problems and challenges are analyzed in the hope of providing references for the study of exchange bias systems at room temperature.
1 Meiklejohn W H, Bean C P, Physical Review, 1956, 102(5), 1413. 2 周圣强, 刘先松. 阜阳师范学院学报, 2010,27 (4), 46. 3 董思宁, 黄晓桦, 李晓光. 中国材料进展, 2011, 30 (1), 46. 4 Manna P K, Yusuf S M.Physics Report, 2014, 535,61. 5 Nogués J, Schuller I K. Journal of Magnetism and Magnetic Materials, 1999, 192(2), 203. 6 Skumrye V, Stoyanov S, Zhang Y,et al. Nature, 2003, 423, 850. 7 Wang B M, Liu Y, Ren P, et al. Physical Review Letters, 2011, 106 (7), 077203. 8 Binns C, Qureshi M T, Peddis D,et al. Nano Letters, 2013, 13 (7), 3334. 9 Mitra A, Mahapatra A S, Mallick A,et al. Journal of Magnetism and Magnetic Materials, 2017, 424, 388. 10 王理想, 吴子鸣, 吴翌彬, 等.常熟理工学院学报, 2019, 33 (2) ,1. 11 Sarka S, Mondal A, Giri N,et al. Physical Chemistry Chemical Physics, 2019, 21, 260. 12 Mao H J, Song C, Cui B, et al. Journal of Applied Physics, 2013, 114 (4), 043904. 13 Borisov P, Hochstrat A, Chen X, et al. Physical Review Letters, 2005, 94 (11), 117203. 14 He X, Wang Y, Wu N, et al. Nature Materials, 2010, 9, 579. 15 Wang C H, Zhou L, Fu Q Y, et al. Journal of Magnetism and Magnetic Materials, 2018, 449, 372. 16 Béa H, Bibes M, Cherifi S, et al. Applied Physics Letters, 2006, 89 (24), 242114. 17 Sterwerf C, Meinert M, Arenholz E, et al. IEEE Transactions on Magne-tics, 2016, 52 (7), 4800204. 18 Martin L W, Chu Y H, Zhan Q, et al. Applied Physics Letters, 2007, 91 (17), 172513. 19 Dho J, Qi X D, Kim H, et al. Advanced Materials, 2006, 18, 1445. 20 Wei L J, Hu Z Z, Du G X, et al. Advanced Materials, 2018,30(30), 1801885. 21 Choi E M, Weal E, Bi Z X, et al. Applied Physics Letters, 2013, 102 (1), 012905. 22 Bansal R, Chowdhury N, Muduli P K. Applied Physics Letters, 2018, 112 (26), 262403. 23 Migliorini A, Kuerbanjiang B, Huminiuc T, et al. Nature Materials, 2018, 17, 28. 24 Meinert M, Büker B, Graulich D, et al. Physical Review B. 2015, 92 (14), 144408. 25 Zilske P, Graulich D, Dunz M, et al. Applied Physics Letters, 2017, 110 (19), 192402. 26 Gao H X, Harumoto T, Luo W K, et al. Journal of Magnetism and Magnetic Materials, 2019, 473, 490. 27 Basith M A, Khan F A, Ahmmad B, et al. Journal of Applied Physics, 2015, 118 (2), 023901. 28 Han Y L, Liu W F, Xu X L, et al. Journal of the American Ceramic Society, 2016, 99 (11), 3616. 29 Xu Y, Gao Y F, Xing H J, et al. Ceramics International, 2018, 44 (14), 17459. 30 Zhang C, Wang S Y, Liu W F,et al. Journal of Nanoparticle Research, 2017, 19, 182. 31 Zhu C M, Wang L G, Liu F C,et al. Ceramics International, 2018, 45 (8), 9878. 32 Mohanty P, Marik S, Singh D, et al. Applied Physics Letters, 2017, 111 (2), 022402. 33 Prajapat M, Marika S, Kumar K S,et al. Journal of Magnetism and Magnetic Materials, 2019, 478, 247. 34 Qian J F, Nayak A K, Kreiner G,et al. Journal of Physics D, Applied Physics, 2014, 47, 305001. 35 Feng H L, Adler P, Reehuis M,et al. Chemistry of Materials, 2017, 29, 886. 36 Wang X X, Cheng X Y, Gao S, et al. Journal of Magnetism and Magne-tic Materials, 2016, 399, 170.