Fe diffusion, oxidation, and reduction at the CoFeB/MgO interface studied by soft x-ray absorption spectroscopy and magnetic circular dichroism

被引：38

作者：

Hindmarch, A. T. ^{[1
]}

Dempsey, K. J. ^{[1
]}

Ciudad, D. ^{[1
]}

Negusse, E. ^{[2
]}

Arena, D. A. ^{[3
]}

Marrows, C. H. ^{[1
]}

机构：

[1] Univ Leeds, Sch Phys & Astron, Leeds LS2 9JT, W Yorkshire, England

[2] Montana State Univ, Dept Phys, Bozeman, MT 59717 USA

[3] Brookhaven Natl Lab, Natl Synchrotron Light Source, Upton, NY 11973 USA

来源：

APPLIED PHYSICS LETTERS | 2010年 / 96卷 / 09期

基金：

英国工程与自然科学研究理事会;

关键词：

cobalt compounds; diffusion; ferromagnetic materials; interface magnetism; iron compounds; magnesium compounds; magnetic annealing; magnetic circular dichroism; magnetic tunnelling; magnetisation; oxidation; reduction (chemical); X-ray absorption spectra; ROOM-TEMPERATURE; TUNNEL-JUNCTIONS; MAGNETORESISTANCE; BARRIERS;

D O I：

10.1063/1.3332576

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We have studied the effect of annealing on the interface magnetization in a CoFeB/MgO structure which models the lower electrode in a magnetic tunnel junction device. We find that MgO deposition causes Fe to diffuse toward the CoFeB/MgO interface, where it preferentially bonds with oxygen to form a Fe-O-rich interfacial region with reduced magnetization. After annealing at 375 degrees C the compositional inhomogeneity remains; Fe is reduced back to a ferromagnetic metallic state and the full interfacial magnetization is regained.

引用

页数：3

共 50 条

[41] Magnetic phase diagram of an amorphous Er-Fe alloy studied by X-ray magnetic circular dichroism
Pizzini, S
Garcia, LM
Fontaine, A
Rueff, JP
Vogel, J
Galera, RM
Goedkoop, JB
Brookes, NB
Krill, G
Kappler, JP
JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA, 1997, 86 (1-3) : 165 - 173
[42] Soft x-ray circular polarizer using magnetic circular dichroism at the Fe L-3 line
Kortright, JB
Kim, SK
Warwick, T
Smith, NV
APPLIED PHYSICS LETTERS, 1997, 71 (11) : 1446 - 1448
[43] Angle-resolved soft X-ray magnetic circular dichroism in a monatomic Fe layer facing an MgO(001) tunnel barrier
Mamiya, K.
Koide, T.
Ishida, Y.
Osafune, Y.
Fujimori, A.
Suzuki, Y.
Katayama, T.
Yuasa, S.
RADIATION PHYSICS AND CHEMISTRY, 2006, 75 (11) : 1872 - 1877
[44] X-ray absorption and X-ray magnetic circular dichroism studies of a monatomic Fe(001) layer facing a single-crystalline MgO(001) tunnel barrier
Miyokawa, K
Saito, S
Katayama, T
Saito, T
Kamino, T
Hanashima, K
Suzuki, Y
Mamiya, K
Koide, T
Yuasa, S
JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS, 2005, 44 (1-7): : L9 - L11
[45] Soft x-ray polarization and magnetic circular dichroism measurement system
Hirai, Y
Takahashi, H
Komuro, M
Sugita, Y
JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA, 1996, 80 : 385 - 388
[46] Soft x-ray magnetic circular dichroism study of Cr tellurides
Yaji, K
Kimura, A
Koyama, M
Hirai, C
Sato, H
Shimada, K
Tanaka, A
Taniguchi, M
JOURNAL OF APPLIED PHYSICS, 2005, 97 (10)
[47] Soft x-ray magnetic circular dichroism study of magnetite nanoparticles
Yamasaki, A.
Kobori, H.
Osawa, H.
Nakamura, T.
Sugimura, A.
25TH INTERNATIONAL CONFERENCE ON LOW TEMPERATURE PHYSICS (LT25), PART 4: QUANTUM PHASE TRANSITIONS AND MAGNETISM, 2009, 150
[48] Magnetic circular dichroism in soft X-ray resonant inelastic scattering
L. Braicovich
F. Borgatti
A. Tagliaferri
G. Ghiringhelli
N.B. Brookes
P. Ferriani
C.M. Bertoni
Applied Physics A, 2001, 73 : 679 - 686
[49] Magnetic circular dichroism in soft X-ray resonant inelastic scattering
Braicovich, L
Borgatti, F
Tagliaferri, A
Ghiringhelli, G
Brookes, NB
Ferriani, P
Bertoni, CM
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING, 2001, 73 (06): : 679 - 686
[50] Electronic structure investigation of GdNi using x-ray absorption, magnetic circular dichroism, and hard x-ray photoemission spectroscopy
Chuang, C. W.
Lin, H. J.
de Groot, F. M. F.
Chang, F. H.
Chen, C. T.
Chin, Y. Y.
Liao, Y. F.
Tsuei, K. D.
Chelvane, J. Arout
Nirmala, R.
Chainani, A.
PHYSICAL REVIEW B, 2020, 101 (11)

← 1 2 3 4 5 →