Coercivity tuning in Co/Pd multilayer based bit patterned media

被引:79
作者
Hellwig, O. [1 ]
Hauet, T. [1 ]
Thomson, T. [1 ]
Dobisz, E. [1 ]
Risner-Jamtgaard, J. D. [1 ]
Yaney, D. [1 ]
Terris, B. D. [1 ]
Fullerton, E. E. [2 ]
机构
[1] Hitachi Global Storage Technol, San Jose Res Ctr, San Jose, CA 95135 USA
[2] Univ Calif San Diego, Ctr Magnet Recording Res, La Jolla, CA 92093 USA
关键词
MAGNETIC-ANISOTROPY; DOMAIN-STRUCTURE; FILMS;
D O I
10.1063/1.3271679
中图分类号
O59 [应用物理学];
学科分类号
摘要
In order to adjust the reversal field of high anisotropy [Co(2.8 angstrom/Pd(9 angstrom)](8) bit patterned media (BPM), one may increase the individual Co thickness to change the overall anisotropy or alternatively combine the high anisotropy multilayer with a lower anisotropy material, thus creating a heterogeneous laminated system. In the current study, we find that [Co/Pd](8-N)[Co/Ni](N) hard-soft laminated BPM allows tuning the coercivity while maintaining a narrow normalized switching field distribution (sigma(SFD)/H(C)), whereas homogeneous structures with increased individual Co thickness show a more pronounced increase in sigma(SFD)/H(C). Possible reasons for the different behavior, such as changes in strain and texture, are discussed. (C) 2009 American Institute of Physics. [doi: 10.1063/1.3271679]
引用
收藏
页数:3
相关论文
共 14 条
[1]   Balancing interlayer dipolar interactions in multilevel patterned media with out-of-plane magnetic anisotropy [J].
Baltz, V. ;
Rodmacq, B. ;
Bollero, A. ;
Ferre, J. ;
Landis, S. ;
Dieny, B. .
APPLIED PHYSICS LETTERS, 2009, 94 (05)
[2]   INTERFACE MAGNETIC-ANISOTROPY IN EPITAXIAL SUPERLATTICES [J].
ENGEL, BN ;
ENGLAND, CD ;
VANLEEUWEN, RA ;
WIEDMANN, MH ;
FALCO, CM .
PHYSICAL REVIEW LETTERS, 1991, 67 (14) :1910-1913
[3]   Suppression of magnetic trench material in bit patterned media fabricated by blanket deposition onto prepatterned substrates [J].
Hellwig, O. ;
Moser, A. ;
Dobisz, E. ;
Bandic, Z. Z. ;
Yang, H. ;
Kercher, D. S. ;
Risner-Jamtgaard, J. D. ;
Yaney, D. ;
Fullerton, E. E. .
APPLIED PHYSICS LETTERS, 2008, 93 (19)
[4]   Separating dipolar broadening from the intrinsic switching field distribution in perpendicular patterned media [J].
Hellwig, O. ;
Berger, A. ;
Thomson, T. ;
Dobisz, E. ;
Bandic, Z. Z. ;
Yang, H. ;
Kercher, D. S. ;
Fullerton, E. E. .
APPLIED PHYSICS LETTERS, 2007, 90 (16)
[5]   Domain structure and magnetization reversal of antiferromagnetically coupled perpendicular anisotropy films [J].
Hellwig, Olav ;
Berger, Andreas ;
Kortright, Jeffrey B. ;
Fullerton, Eric E. .
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2007, 319 (1-2) :13-55
[6]   Microstructural origin of switching field distribution in patterned Co/Pd multilayer nanodots [J].
Lau, J. W. ;
McMichael, R. D. ;
Chung, S. H. ;
Rantschler, J. O. ;
Parekh, V. ;
Litvinov, D. .
APPLIED PHYSICS LETTERS, 2008, 92 (01)
[7]   Domain structure in magnetic dots prepared by nanoimprint and e-beam lithography [J].
Moritz, J ;
Dieny, B ;
Nozières, JP ;
Landis, S ;
Lebib, A ;
Chen, Y .
JOURNAL OF APPLIED PHYSICS, 2002, 91 (10) :7314-7316
[8]   Analysis of interfacial magnetic anisotropy in Co/Pt and Co/Pd multilayer films [J].
Nemoto, H ;
Hosoe, Y .
JOURNAL OF APPLIED PHYSICS, 2005, 97 (10)
[9]   Disorder-induced microscopic magnetic memory [J].
Pierce, MS ;
Buechler, CR ;
Sorensen, LB ;
Turner, JJ ;
Kevan, SD ;
Jagla, EA ;
Deutsch, JM ;
Mai, T ;
Narayan, O ;
Davies, JE ;
Liu, K ;
Dunn, JH ;
Chesnel, KM ;
Kortright, JB ;
Hellwig, O ;
Fullerton, EE .
PHYSICAL REVIEW LETTERS, 2005, 94 (01)
[10]   Micromagnetic simulations for terabit/in2 head/media systems [J].
Schabes, Manfred E. .
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2008, 320 (22) :2880-2884