NMR evidence for MnSb environments within epitaxial NiMnSb films grown on GaAs(001)

被引：13

作者：

Wojcik, M

Van Roy, W

Jedryka, E

Nadolski, S

Borghs, G

De Boeck, J

机构：

[1] Polish Acad Sci, Inst Phys, PL-02668 Warsaw, Poland

[2] IMEC, B-3001 Louvain, Belgium

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2002年 / 240卷 / 1-3期

关键词：

NMR-spin echo; half-metallic ferromagnets; Heusler alloys; structural defects;

D O I：

10.1016/S0304-8853(01)00877-0

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A thorough structural study has been performed on a series of MBE-grown NiMnSb/GaAs(0 0 1) films using Mn-55 and Sb-121(123) nuclear magnetic resonance. In addition to a small amount (<4%) of classical point defects, the films reveal some twinning faults leading locally to formulation of hexagonal MnSb. In case of stoichiometric NiMnSb, the amount of MnSb phase is estimated to be about 14% of a total sample volume. The excess of Sb increases the amount of MnSb environments, while in the Sb poor samples these inclusions practically disappear. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：414 / 416

页数：3

共 11 条

[1]

CASTELLIZ L, 1955, Z METALLKD, V46, P198

[2] NMR OF MN55 SB121 AND SB123 IN FERROMAGNETIC MNNISB [J].

HIHARA, T ;

KAWAKAMI, M ;

KASAYA, M ;

ENOKIYA, H .

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 1969, 26 (04) :1061-&

[3]

Le Dang K, 1978, J PHYS F MET PHYS, V8, P1811

[4]

LEDANG K, 1989, J PHYS-CONDENS MAT, V1, P6153, DOI 10.1088/0953-8984/1/35/014

[5] First-principles calculation of the effect of atomic disorder on the electronic structure of the half-metallic ferromagnet NiMnSb [J].

Orgassa, D ;

Fujiwara, H ;

Schulthess, TC ;

Butler, WH .

PHYSICAL REVIEW B, 1999, 60 (19) :13237-13240

[6] EXTENDED AND LOCAL-EFFECTS OF COLD WORK IN HEUSLER ALLOYS [J].

SCHAF, J ;

LEDANG, K ;

VEILLET, P ;

CAMPBELL, IA .

JOURNAL OF PHYSICS F-METAL PHYSICS, 1983, 13 (06) :1311-1316

[7] Fundamental obstacle for electrical spin injection from a ferromagnetic metal into a diffusive semiconductor [J].

Schmidt, G ;

Ferrand, D ;

Molenkamp, LW ;

Filip, AT ;

van Wees, BJ .

PHYSICAL REVIEW B, 2000, 62 (08) :R4790-R4793

[8] Epitaxial NiMnSb films on GaAs(001) [J].

Van Roy, W ;

De Boeck, J ;

Brijs, B ;

Borghs, G .

APPLIED PHYSICS LETTERS, 2000, 77 (25) :4190-4192

[9] Epitaxial growth of the half-metallic ferromagnet NiMnSb on GaAs(001) [J].

Van Roy, W ;

Borghs, G ;

De Boeck, J .

JOURNAL OF CRYSTAL GROWTH, 2001, 227 :862-866

[10]

VANROY W, IN PRESS

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