First-order reversal curve diagram analysis of a perpendicular nickel nanopillar array

被引:159
作者
Pike, CR [1 ]
Ross, CA
Scalettar, RT
Zimanyi, G
机构
[1] Univ Calif Davis, Dept Phys, Davis, CA 95616 USA
[2] MIT, Dept Mat Sci & Engn, Cambridge, MA 02139 USA
关键词
D O I
10.1103/PhysRevB.71.134407
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
We apply a first-order reversal curve (FORC) diagram analysis to a perpendicular nickel nanopillar array. We find that the FORC diagram signature of this system consists of a two-branch "wishbone" structure. Two distinct negative regions are also observed, along with a prominent reversible ridge. The objective of this paper is to find a qualitative physical understanding or interpretation of these features. To accomplish this, we employ an interacting hysteron model. We find that a collection of symmetric hysterons with distributed coercivities and antiparallel mean field can account for the wishbone signature and one of the negative regions. By employing curvilinear hysterons, we can account for the reversible ridge and the other of the negative regions. Through a comparison of modeling and experimental work, we obtain a quantitative estimate of the dipolar interaction strength.
引用
收藏
页数:12
相关论文
共 26 条
[1]  
Aharoni A., 1996, Introduction to the Theory of Ferromagnetism
[2]   Langevin simulation of thermally activated magnetization reversal in nanoscale pillars [J].
Brown, G ;
Novotny, MA ;
Rikvold, PA .
PHYSICAL REVIEW B, 2001, 64 (13)
[3]   The interrelation of reversible and irreversible magnetization [J].
Cammarano, R ;
McCormick, PG ;
Street, R .
JOURNAL OF PHYSICS D-APPLIED PHYSICS, 1996, 29 (09) :2327-2331
[4]   Single-domain circular nanomagnets [J].
Cowburn, RP ;
Koltsov, DK ;
Adeyeye, AO ;
Welland, ME ;
Tricker, DM .
PHYSICAL REVIEW LETTERS, 1999, 83 (05) :1042-1045
[5]   Reorientational magnetic transition in high-density arrays of single-domain dots [J].
Guslienko, KY ;
Choe, SB ;
Shin, SC .
APPLIED PHYSICS LETTERS, 2000, 76 (24) :3609-3611
[6]   Magnetic force microscopy study of interactions in 100 nm period nanomagnet arrays [J].
Hwang, M ;
Abraham, MC ;
Savas, TA ;
Smith, HI ;
Ram, RJ ;
Ross, CA .
JOURNAL OF APPLIED PHYSICS, 2000, 87 (09) :5108-5110
[7]   Reversal-field memory in the hysteresis of spin glasses -: art. no. 257202 [J].
Katzgraber, HG ;
Pázmándi, F ;
Pike, CR ;
Liu, K ;
Scalettar, RT ;
Verosub, KL ;
Zimányi, GT .
PHYSICAL REVIEW LETTERS, 2002, 89 (25) :1-257202
[8]  
Mayergoyz I D., 1991, Mathematical Models of Hysteresis
[9]   MATHEMATICAL-MODELS OF HYSTERESIS [J].
MAYERGOYZ, ID .
IEEE TRANSACTIONS ON MAGNETICS, 1986, 22 (05) :603-608
[10]   First-order reversal curve (FORC) diagrams for pseudo-single-domain magnetites at high temperature [J].
Muxworthy, AR ;
Dunlop, DJ .
EARTH AND PLANETARY SCIENCE LETTERS, 2002, 203 (01) :369-382