Magnetization reversal asymmetry in [Co/Pt]/CoFe/IrMn multilayers with enhanced perpendicular exchange bias

被引：14
作者：
Wu, Qiong
He, Wei
Liu, Hao-Liang
Liu, Yi-fan
Cai, Jian-Wang
Cheng, Zhao-Hua [1 ]
机构：
[1] Chinese Acad Sci, Inst Phys, State Key Lab Magnetism, Beijing 100190, Peoples R China
来源：
JOURNAL OF APPLIED PHYSICS | 2013年 / 113卷 / 03期
关键词：
ULTRATHIN FERROMAGNETIC-FILMS; ANISOTROPY; MAGNETORESISTANCE; DEPENDENCE; BILAYER; LAYER;
D O I：
10.1063/1.4775837
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The magnetization reversal of perpendicular exchange biased [Co/Pt]/Co60Fe40/IrMn and [Co/Pt]/Co/IrMn multilayers was investigated by time-resolved surface magneto-optical Kerr effect and Kerr microscopy. Compared with the nearly symmetric reversal of the [Co/Pt]/Co/IrMn with a smaller exchange bias field, significantly asymmetric domain evolution in the [Co/Pt]/Co60Fe40/IrMn with a larger exchange bias field was directly observed by Kerr microscopy. The asymmetric magnetization reversal is discussed in terms of the average thermally activated energy barriers as well as the dispersions of the barriers. The substitution of the interfacial Co60Fe40 layer for Co layer results in an enhancement of the interfacial exchange coupling epsilon(int) and absolute dispersion of interfacial exchange coupling, sigma(epsilon int), and consequently increases the exchange bias field and reversal asymmetry. (C) 2013 American Institute of Physics. [http://dx.doi.org/10.1063/1.4775837]
引用
收藏
页数：5
相关论文
共 34 条
[1]   Cumulative minor loop growth in Co/Pt and Co/Pd multilayers [J].
Berger, A. ;
Mangin, S. ;
McCord, J. ;
Hellwig, O. ;
Fullerton, E. E. .
PHYSICAL REVIEW B, 2010, 82 (10)
[2]   Direct imaging of asymmetric magnetization reversal in exchange-biased Fe/MnPd bilayers by X-ray photoemission electron microscopy [J].
Blomqvist, P ;
Krishnan, KM ;
Ohldag, H .
PHYSICAL REVIEW LETTERS, 2005, 94 (10)
[3]   HYSTERESIS PROPERTIES OF ULTRATHIN FERROMAGNETIC-FILMS [J].
BRUNO, P ;
BAYREUTHER, G ;
BEAUVILLAIN, P ;
CHAPPERT, C ;
LUGERT, G ;
RENARD, D ;
RENARD, JP ;
SEIDEN, J .
JOURNAL OF APPLIED PHYSICS, 1990, 68 (11) :5759-5766
[4]   Origin of the asymmetric magnetization reversal behavior in exchange-biased systems:: Competing anisotropies -: art. no. 057204 [J].
Camarero, J ;
Sort, J ;
Hoffmann, A ;
García-Martín, JM ;
Dieny, B ;
Miranda, R ;
Nogués, J .
PHYSICAL REVIEW LETTERS, 2005, 95 (05)
[5]   Dependences of the activation volumes on Ar sputtering pressure in Co/Pt multilayers prepared by dc magnetron sputtering [J].
Cho, YC ;
Choe, SB ;
Shin, SC .
APPLIED PHYSICS LETTERS, 2002, 80 (03) :452-454
[6]   Thermally activated magnetization reversal in exchange-biased [Pt/Co]3/Pt/IrMn multilayers [J].
Czapkiewicz, Maciej ;
Stobiecki, Tomasz ;
van Dijken, Sebastiaan .
PHYSICAL REVIEW B, 2008, 77 (02)
[7]   GIANT MAGNETORESISTANCE IN SOFT FERROMAGNETIC MULTILAYERS [J].
DIENY, B ;
SPERIOSU, VS ;
PARKIN, SSP ;
GURNEY, BA ;
WILHOIT, DR ;
MAURI, D .
PHYSICAL REVIEW B, 1991, 43 (01) :1297-1300
[8]   THEORETICAL CONSIDERATIONS ON SWITCHING TRANSIENT IN FERROELECTRICS [J].
FATUZZO, E .
PHYSICAL REVIEW, 1962, 127 (06) :1999-&
[9]   Asymmetric magnetization reversal in exchange-biased hysteresis loops [J].
Fitzsimmons, MR ;
Yashar, P ;
Leighton, C ;
Schuller, IK ;
Nogués, J ;
Majkrzak, CF ;
Dura, JA .
PHYSICAL REVIEW LETTERS, 2000, 84 (17) :3986-3989
[10]   Exchange bias in (Pt/Co0.9Fe0.1)n/FeMn multilayers with perpendicular magnetic anisotropy [J].
Garcia, F ;
Casali, G ;
Auffret, S ;
Rodmacq, B ;
Dieny, B .
JOURNAL OF APPLIED PHYSICS, 2002, 91 (10) :6905-6907
1234