Effective surface Debye temperature for NiMnSb(100) epitaxial films

被引：55

作者：

Borca, CN ^{[1
]}

Komesu, T

Jeong, HK

Dowben, PA

Ristoiu, D

Hordequin, C

Pierre, J

Nozières, JP

机构：

[1] Univ Nebraska, Behlen Lab Phys, Dept Phys & Astron, Lincoln, NE 68588 USA

[2] Univ Nebraska, Behlen Lab Phys, Ctr Mat Res & Anal, Lincoln, NE 68588 USA

[3] CNRS, Lab Louis Neel, F-38042 Grenoble, France

来源：

APPLIED PHYSICS LETTERS | 2000年 / 77卷 / 01期

关键词：

D O I：

10.1063/1.126886

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The surface Debye temperature of the NiMnSb (100) epitaxial films has been obtained using low energy electron diffraction, inverse photoemission, and core-level photoemission. The normal dynamic motion of the (100) surface results in a value for the effective surface Debye temperature of 145 +/- 13 K. This is far smaller than the bulk Debye temperature of 312 +/- 5 K obtained from wave vector dependent inelastic neutron scattering. The large difference between these measures of surface and bulk dynamic motion indicates a soft and compositionally different (100) surface. (C) 2000 American Institute of Physics. [S0003-6951(00)05127-5].

引用

页码：88 / 90

页数：3

共 28 条

[1]

BADORF AD, 1991, PHYS REV LETT, V66, P2770

[2]

BADORF AD, 1990, J ELECT SPECTROSC RE, V54, P541

[3] SYSTEMATIC TRENDS IN THE NORMAL ENHANCEMENT OF THE PHONON ANHARMONICITY AT THE SURFACE OF METALS [J].

BENEDEK, G ;

TOENNIES, JP .

PHYSICAL REVIEW B, 1992, 46 (20) :13643-13646

[4] Influence of dynamical scattering in crystalline poly(vinylidene fluoride-trifluoroethylene) copolymers [J].

Borca, CN ;

Choi, J ;

Adenwalla, S ;

Ducharme, S ;

Dowben, PA ;

Robertson, L ;

Fridkin, VM ;

Palto, SP ;

Petukhova, N .

APPLIED PHYSICS LETTERS, 1999, 74 (03) :347-349

[5] Changes in metallicity and electronic structure across the surface ferroelectric transition of ultrathin crystalline poly(vinylidene fluoride-trifluoroethylene) copolymers [J].

Choi, JW ;

Dowben, PA ;

Pebley, S ;

Bune, AV ;

Ducharme, S ;

Fridkin, VM ;

Palto, SP ;

Petukhova, N .

PHYSICAL REVIEW LETTERS, 1998, 80 (06) :1328-1331

[6]

CLARK LJ, 1985, SURFACE CRYSTALLOGRA

[7] ANHARMONICITY AND DISORDER ON THE CU(110) SURFACE [J].

DITLEVSEN, PD ;

STOLTZE, P ;

NORSKOV, JK .

PHYSICAL REVIEW B, 1991, 44 (23) :13002-13009

[8]

GOPAL ESR, 1966, SPECIFIC HEATS LOW T, P29

[9] Magnetic excitations in the half-metallic NiMnSb ferromagnet: From Heisenberg-type to itinerant behaviour [J].

Hordequin, C ;

Pierre, J ;

Currat, R .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1996, 162 (01) :75-84

[10] Half metallic NiMnSb-based spin-valve structures [J].

Hordequin, C ;

Nozieres, JP ;

Pierre, J .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1998, 183 (1-2) :225-231

← 1 2 3 →