POSITRON-ANNIHILATION STUDY OF THE HALF-METALLIC FERROMAGNET NIMNSB - EXPERIMENT

被引：177

作者：

HANSSEN, KEHM ^{[1
]}

MIJNARENDS, PE ^{[1
]}

RABOU, LPLM ^{[1
]}

BUSCHOW, KHJ ^{[1
]}

机构：

[1] NETHERLANDS ENERGY RES FDN,1755 ZG PETTEN,NETHERLANDS

来源：

PHYSICAL REVIEW B | 1990年 / 42卷 / 03期

关键词：

D O I：

10.1103/PhysRevB.42.1533

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Spin-polarized measurements of the two-dimensional angular correlation of annihilation radiation in NiMnSb are presented. By making use of the inherent partial polarization of the positron beam and the alignment of the magnetic domains with the aid of an external magnetic field, the sum and difference of the spin-dependent contributions to the angular correlation have been obtained for integration directions 100, 110, and 111. The results are compared with calculated distributions. A least-squares analysis of the data yields a value of (-8.4±0.1)×10-3 for the three-photon difference effect in NiMnSb and establishes the half-metallic character of the band structure with an accuracy of -0.02+0.01 electrons per formula unit. © 1990 The American Physical Society.

引用

页码：1533 / 1540

页数：8

共 34 条

[11] HALF-METALLIC FERROMAGNETS AND THEIR MAGNETO-OPTICAL PROPERTIES
DEGROOT, RA
MUELLER, FM
VANENGEN, PG
BUSCHOW, KHJ
[J]. JOURNAL OF APPLIED PHYSICS, 1984, 55 (06) : 2151 - 2154
[12] HANSSEN KEH, 1988, ECN209 NETH EN RES F
[13] POSITRON-ANNIHILATION STUDY OF THE HALF-METALLIC FERROMAGNET NIMNSB - THEORY
HANSSEN, KEHM
MIJNARENDS, PE
[J]. PHYSICAL REVIEW B, 1986, 34 (08): : 5009 - 5016
[14] HELMHOLDT RB, 1984, J MAGN MAGN MATER, V43, P249, DOI 10.1016/0304-8853(84)90075-1
[15] CRO2 - A NEW HALF-METALLIC FERROMAGNET
KAMPER, KP
SCHMITT, W
GUNTHERODT, G
GAMBINO, RJ
RUF, R
[J]. PHYSICAL REVIEW LETTERS, 1987, 59 (24) : 2788 - 2791
[16] OBSERVATION OF MANY-BODY EFFECTS IN POSITRON-ANNIHILATION IN ALKALI-METALS
KIM, SM
STEWART, AT
[J]. PHYSICAL REVIEW B, 1975, 11 (07): : 2490 - 2499
[17] PHOTOEMISSION OF INTERMETALLICS
KISKER, E
CARBONE, C
FLIPSE, CF
WASSERMANN, EF
[J]. JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1987, 70 (1-3) : 21 - 27
[18] KUBLER J, 1984, PHYSICA B & C, V127, P257, DOI 10.1016/S0378-4363(84)80039-X
[19] POSITRON-ANNIHILATION AND FERMI-SURFACE STUDIES - NEW APPROACH
LOCK, DG
CRISP, VHC
WEST, RN
[J]. JOURNAL OF PHYSICS F-METAL PHYSICS, 1973, 3 (03): : 561 - 570
[20] POSITRON-ANNIHILATION IN 3D METALS .2. INVESTIGATION OF SPIN AND MOMENTUM DENSITY IN MAGNETIZED IRON WITH POLARIZED POSITRONS
MIJNAREN.PE
[J]. PHYSICA, 1973, 63 (02): : 248 - 262

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