Interfacial structure and magnetic properties of Co2FeAl0.5Si0.5/MgO heterostructures

被引：14

作者：

Hassan, Sameh S. A. ^{[1
,2
]}

Xu, Yongbing ^{[1
]}

Hirohata, Atsufumi ^{[1
]}

Sukegawa, Hiroaki ^{[3
]}

Wang, Wenhong ^{[3
]}

Inomata, Koichiro ^{[3
]}

van der Laan, Gerrit ^{[4
]}

机构：

[1] Univ York, Dept Elect, Spintron & Nanodevice Lab, York YO10 5DD, N Yorkshire, England

[2] Seagate Technol, Dept Res & Dev, Springtown BT48 0BF, Londonderry, North Ireland

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

[4] Diamond Light Source, Didcot OX11 0DE, Oxon, England

来源：

JOURNAL OF APPLIED PHYSICS | 2010年 / 107卷 / 10期

关键词：

TUNNEL-JUNCTIONS; BARRIER; MAGNETORESISTANCE; DICHROISM; ALLOYS; LAYER;

D O I：

10.1063/1.3371694

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The interfacial properties of the Co2FeAl0.5Si0.5/MgO based magnetic tunnel junction have been investigated using x ray absorption spectroscopy (XAS), angle resolved x ray photoelectron spectroscopy (ARXPS), x ray magnetic circular dichroism (XMCD), and element-specific hysteresis loops. The XAS demonstrates a multiplet structure at the Co L-3 edge which could be attributed to the formation of CoO at the interface due to the high annealing temperature. The XMCD sum-rule analysis and the element-specific hysteresis loops show a higher magnetic moment, a change in the loop shape, and an increase in the Co coercive field when probing more close to the interface layer. The chemical and structural disorder at the interface has been further revealed by the ARXPS measurements. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3371694]

引用

页数：5

共 26 条

[1] Properties of the quaternary half-metal-type Heusler alloy Co2Mn1-xFexSi
Balke, Benjamin
Fecher, Gerhard H.
Kandpal, Hem C.
Felser, Claudia
Kobayashi, Keisuke
Ikenaga, Eiji
Kim, Jung-Jin
Ueda, Shigenori
[J]. PHYSICAL REVIEW B, 2006, 74 (10)
[2] Structural and magnetic properties of BCCFe/Co (001) superlattices
Blomqvist, P
Wäppling, R
Broddefalk, A
Nordblad, P
te Velthuis, SGE
Felcher, GP
[J]. JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2002, 248 (01) : 75 - 84
[3] Briggs D., 1996, Practical Surface Analysis, V1
[4] Growth and magnetic characterization of Co nanoparticles obtained by femtosecond pulsed laser deposition
Cebollada, A.
Garcia Martin, J. M.
Clavero, C.
Balcells, Ll.
Estrade, S.
Arbiol, J.
Peiro, F.
Smith, C.
Clarke, R.
Martinez, L.
Huttel, Y.
Roman, E.
Telling, N. D.
van der Laan, G.
[J]. PHYSICAL REVIEW B, 2009, 79 (01)
[5] NEW CLASS OF MATERIALS - HALF-METALLIC FERROMAGNETS
DEGROOT, RA
MUELLER, FM
VANENGEN, PG
BUSCHOW, KHJ
[J]. PHYSICAL REVIEW LETTERS, 1983, 50 (25) : 2024 - 2027
[6] Substituting the main group element in cobalt-iron based Heusler alloys:: Co2FeAl1-xSix
Fecher, Gerhard H.
Felser, Claudia
[J]. JOURNAL OF PHYSICS D-APPLIED PHYSICS, 2007, 40 (06) : 1582 - 1586
[7] Grain boundary mediated oxidation and interlayer dipolar coupling in a magnetic tunnel junction structure
Freeland, JW
Keavney, DJ
Winarski, R
Ryan, P
Slaughter, JM
Dave, RW
Janesky, J
[J]. PHYSICAL REVIEW B, 2003, 67 (13)
[8] Ab initio predictions for the effect of disorder and quarternary alloying on the half-metallic properties of selected Co2Fe-based Heusler alloys
Gercsi, Z.
Hono, K.
[J]. JOURNAL OF PHYSICS-CONDENSED MATTER, 2007, 19 (32)
[9] The Properties and Structure Relationship of Half Metallic Magnetic Materials on GaAs
Hassan, Sameh S. A.
Xu, Yongbing
Wu, Jing
Zheng, Jian-Guo
Huang, Jianyu Y.
Huang, Yizhong
Damsgaard, Christian D.
Hansen, Jorn B.
Jacobsen, Claus S.
[J]. IEEE TRANSACTIONS ON MAGNETICS, 2009, 45 (10) : 4360 - 4363
[10] Tunnel magnetoresistance of 604% at 300 K by suppression of Ta diffusion in CoFeB/MgO/CoFeB pseudo-spin-valves annealed at high temperature
Ikeda, S.
Hayakawa, J.
Ashizawa, Y.
Lee, Y. M.
Miura, K.
Hasegawa, H.
Tsunoda, M.
Matsukura, F.
Ohno, H.
[J]. APPLIED PHYSICS LETTERS, 2008, 93 (08)

← 1 2 3 →