Positive exchange bias in FeF2-Fe bilayers

被引：513

作者：

Nogues, J ^{[1
]}

Lederman, D ^{[1
]}

Moran, TJ ^{[1
]}

Schuller, IK ^{[1
]}

机构：

[1] W VIRGINIA UNIV,DEPT PHYS,MORGANTOWN,WV 26506

来源：

PHYSICAL REVIEW LETTERS | 1996年 / 76卷 / 24期

关键词：

D O I：

10.1103/PhysRevLett.76.4624

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have discovered a positive unidirectional exchange anisotropy in antiferromagnetic (FeF2) and ferromagnetic (Fe) bilayers cooled through the antiferromagnetic critical temperature T-N in large magnetic fields. For low positive cooling fields, the ferromagnet's magnetization (M-H) loop center shifts to negative fields, as is normally observed in other systems. In contrast, large cooling fields can cause the shift to be positive. This can be explained if the FeF2 surface spins couple to the external magnetic cooling field above T-N and the FeF2-Fe interaction is antiferromagnetic.

引用

页码：4624 / 4627

页数：4

共 11 条

[1] CRITICAL-BEHAVIOR IN ANISOTROPIC ANTI-FERROMAGNETS
BELANGER, DP
NORDBLAD, P
KING, AR
JACCARINO, V
LUNDGREN, L
BECKMAN, O
[J]. JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1983, 31-4 (FEB) : 1095 - 1096
[2] GIANT MAGNETORESISTANCE IN SOFT FERROMAGNETIC MULTILAYERS
DIENY, B
SPERIOSU, VS
PARKIN, SSP
GURNEY, BA
WILHOIT, DR
MAURI, D
[J]. PHYSICAL REVIEW B, 1991, 43 (01): : 1297 - 1300
[3] NEUTRON DIFFRACTION STUDIES OF ANTIFERROMAGNETISM IN MANGANOUS FLUORIDE AND SOME ISOMORPHOUS COMPOUNDS
ERICKSON, RA
[J]. PHYSICAL REVIEW, 1953, 90 (05): : 779 - 785
[4] INVERTED HYSTERESIS LOOPS IN COO-BASED MULTILAYERS
GAO, C
OSHEA, MJ
[J]. JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1993, 127 (1-2) : 181 - 189
[5] SPIN WAVES IN ANTIFERROMAGNETIC FEF2
HUTCHINGS, MT
RAINFORD, BD
GUGGENHEIM, HJ
[J]. JOURNAL OF PHYSICS PART C SOLID STATE PHYSICS, 1970, 3 (02): : 307 - +
[6] TEMPERATURE-DEPENDENCE OF FEF2 SPIN FLOP FIELD
JACCARINO, V
KING, AR
MOTOKAWA, M
SAKAKIBARA, T
DATE, M
[J]. JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1983, 31-4 (FEB) : 1117 - 1118
[7] NEW MAGNETIC ANISOTROPY
MEIKLEJOHN, WH
BEAN, CP
[J]. PHYSICAL REVIEW, 1956, 102 (05): : 1413 - 1414
[8] SURFACE EFFECTS IN MAGNETIC CRYSTALS NEAR ORDERING TEMPERATURE
MILLS, DL
[J]. PHYSICAL REVIEW B, 1971, 3 (11): : 3887 - &
[9] Nogues J, 1996, APPL PHYS LETT, V68, P3186, DOI 10.1063/1.115819
[10] THE CRYSTAL STRUCTURE OF MNF2, FEF2, COF2, NIF2 AND ZNF2
STOUT, JW
REED, SA
[J]. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1954, 76 (21) : 5279 - 5281

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