[1] Zhang S L, Zhang J Y, Baker A A, Wang S G, Yu G H, Hesjedal A T[J]. Sci. Rep., 4, 6109(2014).

[2] Liu J H, Yang X K, Cui H Q, Wei B, Li C, Chen Y B, Zhang M L, Li C, Dong D N[J]. J. Magn. Magn. Mater., 491, 165607(2019).

[3] Kudo K, Suto H, Nagasawa T, Mizushima K, Sato R[J]. Appl. Phys. Express, 8, 103001(2015).

[4] Lavrijsen R, Lee J H, Fernández-Pacheco A, , Mansell R, Cowburn R P[J]. Nature, 493, 647(2013).

[5] Yang X K, Zhang B, Cui H Q, Li W W, Wang S[J]. Acta Phys. Sin., 65, 237502(2016).

[6] Dong D N, Cai L, Li C, Liu B J, Li C, Liu J H[J]. J. Phys. D: Appl. Phys., 52, 295001(2019).

[7] Eklund A, Bonetti S, Sani S R, Mohseni S M, Persson J, Chung S J, Banuazizi S A H, Iacocca E, Ostling M, Akerman J, Malm B G[J]. Appl. Phys. Lett., 104, 092405(2014).

[8] Zhang G F, Zhang X J, Jiang L J[J]. Mater. Rep B: Res., 30, 148(2016).

[9] Liu M, Zhou Z Y, Nan T X, Howe B M, Brown G J, Sun N X[J]. Adv. Mater., 25, 1435(2013).

[10] Zhou Z Y, Peng B, Zhu M M, Liu M[J]. J. Adv. Dielectr., 6, 1630005(2016).

[11] Suto H, Kanao T, Nagasawa T, Kudo K, Mizushima K, Sato R[J]. Appl. Phys. Lett., 110, 262403(2017).

[12] Yang X K, Zhang B, Liu J H, Zhang M L, Li W W, Cui H Q, Wei B[J]. Chin. Phys. Lett., 35, 057501(2018).

[13] Okamoto S, Kikuchi N, Kato T, Kitakami O, Mitsuzuka K, Shimatsu T, Muraoka H, Aoi H, Lodder J C[J]. J. Magn. Magn. Mater., 320, 2874(2008).

[14] Liu M, Howe B M, Grazulis L, Mahalingam K, Nan T X, Sun N X, Brown G J[J]. Adv. Mater., 25, 4886(2013).

[15] Hu X K, Dey H, Liebing N, Csaba G, Orlov A, Bernstein G H, Porod W, Kryzysteczko P, Sievers S, Schumacher H W[J]. IEEE Trans. Magn., 51, 3401004(2015).

[16] Wei B, Cai L, Yang X K, Li B J, Wang S, Feng C W, Cui H Q, Li C, Liu J H[J]. IEEE. Magn. Lett., 9, 3706505(2018).

[17] Imre A[J]. Disseration U of Notre Dame, 8, 803(2005).

[18] Liu J H, , Wei B, Li C, Dong D N, Li C[J]. IEEE Electron Device Lett., 40, 220(2018).

[19] Gu W J, Pan J, Hu J G[J]. Acta Phys. Sin., 61, 167501(2012).

[20] Nembach H T, Shaw J M, Silva T J, Johnson W L, Kim S A, Mcmichael R D, Kabos P[J]. Phys. Rev. B, 83, 094427(2011).

[21] Mahato B K, Choudhury S, Mandal R, Barman S, Otani Y, Barman A[J]. J. Appl. Phys, 117, 213909(2015).

[22] Adhikari K, Barman S, Mandal R, Otani Y, Barman A[J]. Phys. Rev. Appl., 10, 044010(2018).

[23] Liu J H, Yang X K, Wei B, Li C, Zhang M L, Li C, Dong D N[J]. Acta Phys. Sin., 68, 017501(2019).

[24] Vacca M, Cairo F, Turvani G, Riente F, Zamboni M, Graziano M[J]. IEEE Trans. Nanotechnol., 15, 962(2016).

[25] Abeed M A, Atulasimha J, Bandyopadhyay S[J]. J. Phys: Condens. Matter., 30, 394001(2018).

[26] Melo L, Soares T, Neto O P V[J]. IEEE Trans. Magn., 53, 1(2017).

[27] Niemier M T, Varga E, Bernstein G H, Porod W, Alam M T, Dingler A, Orlov A, Hu X S[J]. IEEE Trans. Nanotechnol., 11, 220(2012).

[28] Zhang B, Yang X K, Wang Z C, Zhang M L[J]. Micro Nano Lett., 9, 359(2014).

[29] Sivasubramani S, Mattela V, Pal C, Acharyya A[J]. Nanotechnology, 30, 37LT02(2019).

[30] Donahue M J, Porter D G[J]. OOMMF  User’s Guide,Version 1.0 Interagency Report NISTIR, 6376(1999).

[31] Cui J Z, Hockel J L, Nordeen P K, Pisani D M, Liang C Y, Carman G P, Lynch C S[J]. Appl. Phys. Lett., 103, 232905(2013).

[32] D’Souza N, Salehi Fashami M S, Bandyopadhyay S, Atulasimha J[J]. Nano Lett., 16, 1069(2016).

[33] Wei B, Cai L, Yang X K, Li C[J]. Acta Phys. Sin., 65, 217501(2016).

[34] Fashami-Salehi M, D’Souza N[J]. J. Magn. Magn. Mater., 438, 76(2017).

[35] Fashami M S, Roy K, Atulasimha J, Bandyopadhyay S[J]. Nanotechnology, 22, 155201(2011).

[36] Jin T L, Hao L, Cao J W, Liu M F, Dang H G, Wang Y, Wu D P, Bai J M, Wei F L[J]. Appl. Phys. Express, 7, 043002(2014).

[37] Yang Q X, Li Y J[J]. Trans. Chin. Electrotechnical Society, 31, 1(2016).

[38] Huang W M, Xue Y L, Wang L, Weng L, Wang B W[J]. Trans. Chin. Electrotechnical Society, 31, 173(2016).

[39] Gao C Y, Huang W M, Liu Z K, Cao X N[J]. Chin. J. Sens. Actuators, 31, 26(2018).

[40] Li J S, Yang Q X, Li Y J, Zhang C G[J]. High Voltage Engineering, 42, 994(2016).

[41] Zhong W D[J]. Ferromagnetism, 366(2017).

[42] Butterill H J[J]. Nature, 161, 554(1948).

[43] Yan M, Peng X L[J]. Fundamentals of Magnetism and Magnetic Materials, 111(2006).