Site disorder in Co2Fe(Al,Si) Heusler alloys and its influence on junction tunnel magnetoresistance

被引：52

作者：

Inomata, K. ^{[1
]}

Wojcik, M. ^{[2
]}

Jedryka, E. ^{[2
]}

Ikeda, N. ^{[3
]}

Tezuka, N. ^{[3
]}

机构：

[1] Natl Inst Mat Sci, Tsukuba, Ibaraki 3050047, Japan

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

[3] Tohoku Univ, Grad Sch Engn, Dept Mat Sci, Sendai, Miyagi 9808579, Japan

来源：

PHYSICAL REVIEW B | 2008年 / 77卷 / 21期

关键词：

D O I：

10.1103/PhysRevB.77.214425

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The local structures around Co atoms in Co2FeSi1-xAlx (x=0, 0.5, and 1.0) Heusler alloys have been investigated using Co-59 NMR spin-echo method and their effect on the tunneling magnetoresistance for the junctions using Co2FeSi0.5Al0.5 electrodes has been discussed. The Co-59 NMR spectra of the Heusler alloys are extremely sensitive to the site disorder and clearly distinguish among the A2, B2, and L2(1) structures providing quantitative information on the amount of disorder. The tunnel magnetoresistance for the junctions is demonstrated to be sensitive to the site disorder in Co2FeSi0.5Al0.5 electrodes.

引用

收藏

页数：9

相关论文

共 36 条

[1] Structural and magnetic properties of Co2FeAl1-xSix [J].

Balke, Benjamin ;

Fecher, Gerhard H. ;

Felser, Claudia .

APPLIED PHYSICS LETTERS, 2007, 90 (24)

[2] Large negative magnetoresi stance effects in Co2Cr0.6Fe0.4Al [J].

Block, T ;

Felser, C ;

Jakob, G ;

Ensling, J ;

Mühling, B ;

Gütlich, P ;

Cava, RJ .

JOURNAL OF SOLID STATE CHEMISTRY, 2003, 176 (02) :646-651

[3] Spin-dependent tunneling conductance of Fe|MgO|Fe sandwiches -: art. no. 054416 [J].

Butler, WH ;

Zhang, XG ;

Schulthess, TC ;

MacLaren, JM .

PHYSICAL REVIEW B, 2001, 63 (05)

[4] Spin-dependent electron momentum density in the Ni2MnSn Heusler alloy -: art. no. 205115 [J].

Deb, A ;

Hiraoka, N ;

Itou, M ;

Sakurai, Y ;

Onodera, M ;

Sakai, N .

PHYSICAL REVIEW B, 2001, 63 (20)

[5] Magnetic Compton scattering study of the Co2FeGa Heusler alloy:: Experiment and theory -: art. no. 064409 [J].

Deb, A ;

Itou, M ;

Sakurai, Y ;

Hiraoka, N ;

Sakai, N .

PHYSICAL REVIEW B, 2001, 63 (06)

[6] Substituting the main group element in cobalt-iron based Heusler alloys:: Co2FeAl1-xSix [J].

Fecher, Gerhard H. ;

Felser, Claudia .

JOURNAL OF PHYSICS D-APPLIED PHYSICS, 2007, 40 (06) :1582-1586

[7] HYPERFINE FIELDS AND ELECTRONIC-STRUCTURES OF THE HEUSLER ALLOYS CO2MNAL, CO2MNGA, CO2MNSI, CO2MNGE, CO2MNSN [J].

FUJII, S ;

SUGIMURA, S ;

ISHIDA, S ;

ASANO, S .

JOURNAL OF PHYSICS-CONDENSED MATTER, 1990, 2 (43) :8583-8589

[8] Slater-Pauling behavior and origin of the half-metallicity of the full-Heusler alloys [J].

Galanakis, I ;

Dederichs, PH ;

Papanikolaou, N .

PHYSICAL REVIEW B, 2002, 66 (17) :1-9

[9] Surface properties of the half- and full-Heusler alloys [J].

Galanakis, I .

JOURNAL OF PHYSICS-CONDENSED MATTER, 2002, 14 (25) :6329-6340

[10] Ab initio predictions for the effect of disorder and quarternary alloying on the half-metallic properties of selected Co2Fe-based Heusler alloys [J].

Gercsi, Z. ;

Hono, K. .

JOURNAL OF PHYSICS-CONDENSED MATTER, 2007, 19 (32)

← 1 2 3 4 →