OSCILLATIONS IN THE EXCHANGE COUPLING OF FERROMAGNETIC LAYERS SEPARATED BY A NONMAGNETIC METALLIC LAYER

被引:135
作者
EDWARDS, DM
MATHON, J
MUNIZ, RB
PHAN, MS
机构
[1] CITY UNIV LONDON,DEPT MATH,LONDON EC1V 0HB,ENGLAND
[2] UNIV FED FLUMINENSE,DEPT FIS,BR-24000 NITEROI,RJ,BRAZIL
关键词
D O I
10.1088/0953-8984/3/26/015
中图分类号
O469 [凝聚态物理学];
学科分类号
070205 ;
摘要
A general theory of oscillations in the exchange coupling J between two transition metal ferromagnets separated by a non-magnetic transition metal spacer is developed. Detailed calculations of J as a function of the spacer layer thickness are made for a specific model based on a simple cubic tight-binding band structure. For a suitable choice of band filling a good account is given of the main features observed in Co/Ru, Co/Cr and Fe/Cr layered structures. An analysis of the numerical accuracy required in computing J from a total energy difference is given and this throws some light on difficulties experienced by previous workers using this approach. A general expression for J is obtained for an arbitrary band and finite temperature in the limit of large spacer thickness. A close analogy between oscillations in the exchange coupling and de Haas-van Alphen oscillations is established and the relation to RKKY theory is also discussed. It is shown that the period, asymptotic decay and temperature dependence of the oscillations in J are determined by properties of the Fermi surface of the spacer layer.
引用
收藏
页码:4941 / 4958
页数:18
相关论文
共 17 条
  • [1] Abrikosov A.A, 1972, INTRO THEORY NORMAL, V12
  • [2] GIANT MAGNETORESISTANCE OF (001)FE/(001) CR MAGNETIC SUPERLATTICES
    BAIBICH, MN
    BROTO, JM
    FERT, A
    VANDAU, FN
    PETROFF, F
    EITENNE, P
    CREUZET, G
    FRIEDERICH, A
    CHAZELAS, J
    [J]. PHYSICAL REVIEW LETTERS, 1988, 61 (21) : 2472 - 2475
  • [3] BALTENSBERGER W, 1990, PREPRINT
  • [4] ANTIPARALLEL COUPLING BETWEEN FE LAYERS SEPARATED BY A CR INTERLAYER - DEPENDENCE OF THE MAGNETIZATION ON THE FILM THICKNESS
    CARBONE, C
    ALVARADO, SF
    [J]. PHYSICAL REVIEW B, 1987, 36 (04): : 2433 - 2435
  • [5] SPECIAL POINTS IN 2-DIMENSIONAL BRILLOUIN ZONE
    CUNNINGHAM, SL
    [J]. PHYSICAL REVIEW B, 1974, 10 (12): : 4988 - 4994
  • [6] OSCILLATIONS IN EXCHANGE COUPLING ACROSS A NONMAGNETIC METALLIC LAYER
    EDWARDS, DM
    MATHON, J
    [J]. JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1991, 93 : 85 - 88
  • [7] BAND-STRUCTURE AND ORDERING OF MAGNETIC SUPERLATTICES
    FAIRBAIRN, WM
    YIP, SY
    [J]. JOURNAL OF PHYSICS-CONDENSED MATTER, 1990, 2 (18) : 4197 - 4208
  • [8] LAYERED MAGNETIC-STRUCTURES - EVIDENCE FOR ANTIFERROMAGNETIC COUPLING OF FE LAYERS ACROSS CR INTERLAYERS
    GRUNBERG, P
    SCHREIBER, R
    PANG, Y
    BRODSKY, MB
    SOWERS, H
    [J]. PHYSICAL REVIEW LETTERS, 1986, 57 (19) : 2442 - 2445
  • [9] HASEGAWA H, 1990, PREPRINT
  • [10] GREENS FUNCTION THEORY OF SURFACE STATES
    KALKSTEIN, D
    SOVEN, P
    [J]. SURFACE SCIENCE, 1971, 26 (01) : 85 - +