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

被引：178

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

[1] ELECTRONIC-PROPERTIES OF THE HALF-METALLIC FERROMAGNETIC NIUSN [J].

ALBERS, RC ;

BORING, AM ;

DAALDEROP, GHO ;

MUELLER, FM .

PHYSICAL REVIEW B, 1987, 36 (07) :3661-3664

[2]

Berko S., 1967, POSITRON ANNIHILATIO, P61

[3]

Berko S., 1971, J PHYSIQUE, V32, pC1

[4]

Berko S., 1981, POSITRON SOLID STATE, P64

[5] SPIN POLARIZED PHOTOEMISSION FROM NIMNSB [J].

BONA, GL ;

MEIER, F ;

TABORELLI, M ;

BUCHER, E ;

SCHMIDT, PH .

SOLID STATE COMMUNICATIONS, 1985, 56 (04) :391-394

[6] ENHANCEMENT OF POSITRON-ANNIHILATION WITH CORE ELECTRONS [J].

BONDERUP, E ;

ANDERSEN, JU ;

LOWY, DN .

PHYSICAL REVIEW B, 1979, 20 (03) :883-899

[7] POSITRON IMPLANTATION-PROFILE EFFECTS IN SOLIDS [J].

BRANDT, W ;

PAULIN, R .

PHYSICAL REVIEW B, 1977, 15 (05) :2511-2518

[8] MAGNETO-OPTICAL PROPERTIES OF METALLIC FERROMAGNETIC MATERIALS [J].

BUSCHOW, KHJ ;

VANENGEN, PG ;

JONGEBREUR, R .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1983, 38 (01) :1-22

[9] UNUSUAL MAGNETIC AND LATTICE TRANSFORMATION IN UNISN, A POSSIBLE HALF-METALLIC FERROMAGNETIC SYSTEM [J].

BYKOVETZ, N ;

HERMAN, WN ;

YUEN, T ;

JEE, CS ;

LIN, CL ;

CROW, JE .

JOURNAL OF APPLIED PHYSICS, 1988, 63 (08) :4127-4129

[10] NEW CLASS OF MATERIALS - HALF-METALLIC FERROMAGNETS [J].

DEGROOT, RA ;

MUELLER, FM ;

VANENGEN, PG ;

BUSCHOW, KHJ .

PHYSICAL REVIEW LETTERS, 1983, 50 (25) :2024-2027

← 1 2 3 4 →