Co-Mo and Co-Mo-Cr alloy thin films promising for magnetic recording

G. W. Qin; K. Oikawa; M. Sato; O. Kitakami; Y. Shimada; K. Fukamichi; K. Ishida

doi:10.1109/TMAG.2004.842122

Co-Mo and Co-Mo-Cr alloy thin films promising for magnetic recording

G. W. Qin, K. Oikawa, M. Sato, O. Kitakami, Y. Shimada, K. Fukamichi, K. Ishida

Research output: Contribution to journal › Article › peer-review

12 Citations (Scopus)

Abstract

Phase separation behavior of Co-Mo thin films and magnetic anisotropy energy of Co-Mo and Co-Mo-Cr thin films deposited on Cr(112)//MgO(110) single crystal substrates have been studied by using an analytic transmission electron microscope and a vibrating sample magnetometer. The results show that the phase separation does happen in the Co-Mo thin films, resulting in Mo-rich phase surrounding Co-rich magnetic grains, similar as that in the Co-Cr system. However, the Mo-rich phase still shows the ferromagnetic characteristic at room temperature due to its not so high Mo content. The first order anisotropy constants of the Co-Mo thin films are about double that of the Co-Cr thin films in the composition range of 4.0-14.0 at.%Mo (or Cr). With the addition of Cr into the Co-8.7 at.%Mo thin film, the magnetic anisotropy constants show no obvious deterioration, but it results in the increase of anisotropy field.

Original language	English
Pages (from-to)	918-920
Number of pages	3
Journal	IEEE Transactions on Magnetics
Volume	41
Issue number	2
DOIs	https://doi.org/10.1109/TMAG.2004.842122
Publication status	Published - 2005 Feb
Externally published	Yes

Keywords

Co-Mo
Magnetic anisotropy
Magnetic recording
Phase separation

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Electrical and Electronic Engineering

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@article{ea536371c9254d86bc132a0bac1e3c9b,

title = "Co-Mo and Co-Mo-Cr alloy thin films promising for magnetic recording",

abstract = "Phase separation behavior of Co-Mo thin films and magnetic anisotropy energy of Co-Mo and Co-Mo-Cr thin films deposited on Cr(112)//MgO(110) single crystal substrates have been studied by using an analytic transmission electron microscope and a vibrating sample magnetometer. The results show that the phase separation does happen in the Co-Mo thin films, resulting in Mo-rich phase surrounding Co-rich magnetic grains, similar as that in the Co-Cr system. However, the Mo-rich phase still shows the ferromagnetic characteristic at room temperature due to its not so high Mo content. The first order anisotropy constants of the Co-Mo thin films are about double that of the Co-Cr thin films in the composition range of 4.0-14.0 at.%Mo (or Cr). With the addition of Cr into the Co-8.7 at.%Mo thin film, the magnetic anisotropy constants show no obvious deterioration, but it results in the increase of anisotropy field.",

keywords = "Co-Mo, Magnetic anisotropy, Magnetic recording, Phase separation",

author = "Qin, {G. W.} and K. Oikawa and M. Sato and O. Kitakami and Y. Shimada and K. Fukamichi and K. Ishida",

note = "Funding Information: Manuscript received August 31, 2004. This work was supported by the Japan Science and Technology Agency under the CREST Program, and by the IT21 Program under Grant RR2002 and SRC. G. W. Qin and K. Oikawa are with the Tohoku Center, National Institute of AIST, Sendai 983-8551, Japan (e-mail: gw-qin@aist.go.jp). M. Sato, O. Kitakami, and Y. Shimada are with the Institute of MRAM, Tohoku University, Sendai 980-8577, Japan (e-mail: kitakami@tagen. tohoku.ac.jp). K. Fukamichi and K. Ishida are with the Graduate School of Engineering, Tohoku University, Sendai 980-8579, Japan (e-mail: ishida@material. tohoku.ac.jp). Digital Object Identifier 10.1109/TMAG.2004.842122 Fig. 1. Lattice parameter dependency of the Mo content for the Co–Mo binary alloys, showing somewhat in-plane compressive stress in the Co-16.2 Mo epitaxial thin film. Funding Information: G. W. Qin sincerely appreciates the Japan Society for the Promotion of Science for the JSPS fellowship award. Copyright: Copyright 2008 Elsevier B.V., All rights reserved.",

year = "2005",

month = feb,

doi = "10.1109/TMAG.2004.842122",

language = "English",

volume = "41",

pages = "918--920",

journal = "IEEE Transactions on Magnetics",

issn = "0018-9464",

publisher = "Institute of Electrical and Electronics Engineers Inc.",

number = "2",

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TY - JOUR

T1 - Co-Mo and Co-Mo-Cr alloy thin films promising for magnetic recording

AU - Qin, G. W.

AU - Oikawa, K.

AU - Sato, M.

AU - Kitakami, O.

AU - Shimada, Y.

AU - Fukamichi, K.

AU - Ishida, K.

N1 - Funding Information: Manuscript received August 31, 2004. This work was supported by the Japan Science and Technology Agency under the CREST Program, and by the IT21 Program under Grant RR2002 and SRC. G. W. Qin and K. Oikawa are with the Tohoku Center, National Institute of AIST, Sendai 983-8551, Japan (e-mail: gw-qin@aist.go.jp). M. Sato, O. Kitakami, and Y. Shimada are with the Institute of MRAM, Tohoku University, Sendai 980-8577, Japan (e-mail: kitakami@tagen. tohoku.ac.jp). K. Fukamichi and K. Ishida are with the Graduate School of Engineering, Tohoku University, Sendai 980-8579, Japan (e-mail: ishida@material. tohoku.ac.jp). Digital Object Identifier 10.1109/TMAG.2004.842122 Fig. 1. Lattice parameter dependency of the Mo content for the Co–Mo binary alloys, showing somewhat in-plane compressive stress in the Co-16.2 Mo epitaxial thin film. Funding Information: G. W. Qin sincerely appreciates the Japan Society for the Promotion of Science for the JSPS fellowship award. Copyright: Copyright 2008 Elsevier B.V., All rights reserved.

PY - 2005/2

Y1 - 2005/2

N2 - Phase separation behavior of Co-Mo thin films and magnetic anisotropy energy of Co-Mo and Co-Mo-Cr thin films deposited on Cr(112)//MgO(110) single crystal substrates have been studied by using an analytic transmission electron microscope and a vibrating sample magnetometer. The results show that the phase separation does happen in the Co-Mo thin films, resulting in Mo-rich phase surrounding Co-rich magnetic grains, similar as that in the Co-Cr system. However, the Mo-rich phase still shows the ferromagnetic characteristic at room temperature due to its not so high Mo content. The first order anisotropy constants of the Co-Mo thin films are about double that of the Co-Cr thin films in the composition range of 4.0-14.0 at.%Mo (or Cr). With the addition of Cr into the Co-8.7 at.%Mo thin film, the magnetic anisotropy constants show no obvious deterioration, but it results in the increase of anisotropy field.

AB - Phase separation behavior of Co-Mo thin films and magnetic anisotropy energy of Co-Mo and Co-Mo-Cr thin films deposited on Cr(112)//MgO(110) single crystal substrates have been studied by using an analytic transmission electron microscope and a vibrating sample magnetometer. The results show that the phase separation does happen in the Co-Mo thin films, resulting in Mo-rich phase surrounding Co-rich magnetic grains, similar as that in the Co-Cr system. However, the Mo-rich phase still shows the ferromagnetic characteristic at room temperature due to its not so high Mo content. The first order anisotropy constants of the Co-Mo thin films are about double that of the Co-Cr thin films in the composition range of 4.0-14.0 at.%Mo (or Cr). With the addition of Cr into the Co-8.7 at.%Mo thin film, the magnetic anisotropy constants show no obvious deterioration, but it results in the increase of anisotropy field.

KW - Co-Mo

KW - Magnetic anisotropy

KW - Magnetic recording

KW - Phase separation

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JF - IEEE Transactions on Magnetics

SN - 0018-9464

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ER -

Co-Mo and Co-Mo-Cr alloy thin films promising for magnetic recording

Abstract

Keywords

ASJC Scopus subject areas

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