Microstructure and magnetic properties of FePt-TiC-C granular thin films for perpendicular recording

W. B. Cui; B. S.D.Ch S. Varaprasad; Y. K. Takahashi; T. Shiroyama; K. Hono

doi:10.1016/j.ssc.2013.11.010

Microstructure and magnetic properties of FePt-TiC-C granular thin films for perpendicular recording

W. B. Cui^*, B. S.D.Ch S. Varaprasad, Y. K. Takahashi, T. Shiroyama, K. Hono

^*Corresponding author for this work

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

10 Citations (Scopus)

Abstract

By using TiC as the segregate, FePt-TiC and FePt-TiC-C thin films were prepared by co-sputtering onto strongly (002)-textured MgO/NiTa underlayer on thermally-oxidized Si substrates. The TiC effects on the microstructure and magnetic properties of L1₀ ordered FePt and FePt-C thin films were studied. The TiC segregate can refine the grain size of L1₀ ordered FePt. Coercivities and the degree of L1₀ ordering were degraded with increasing TiC concentration. By properly tuning the composition of TiC and C, the granular microstructure with average grain size of 10.3 nm and standard deviation of 1.86 nm can be achieved with the coercivity of 1.4 T. The balance between microstructure and magnetic properties indicates that mixture addition as the segregates is promising.

Original language	English
Pages (from-to)	17-21
Number of pages	5
Journal	Solid State Communications
Volume	182
DOIs	https://doi.org/10.1016/j.ssc.2013.11.010
Publication status	Published - 2014 Mar
Externally published	Yes

Keywords

A. L1-FePt
B. Co-sputtering
C. TEM
D. Perpendicular anisotropy

ASJC Scopus subject areas

Chemistry(all)
Condensed Matter Physics
Materials Chemistry

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10.1016/j.ssc.2013.11.010

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title = "Microstructure and magnetic properties of FePt-TiC-C granular thin films for perpendicular recording",

abstract = "By using TiC as the segregate, FePt-TiC and FePt-TiC-C thin films were prepared by co-sputtering onto strongly (002)-textured MgO/NiTa underlayer on thermally-oxidized Si substrates. The TiC effects on the microstructure and magnetic properties of L10 ordered FePt and FePt-C thin films were studied. The TiC segregate can refine the grain size of L10 ordered FePt. Coercivities and the degree of L10 ordering were degraded with increasing TiC concentration. By properly tuning the composition of TiC and C, the granular microstructure with average grain size of 10.3 nm and standard deviation of 1.86 nm can be achieved with the coercivity of 1.4 T. The balance between microstructure and magnetic properties indicates that mixture addition as the segregates is promising.",

keywords = "A. L1-FePt, B. Co-sputtering, C. TEM, D. Perpendicular anisotropy",

author = "Cui, {W. B.} and Varaprasad, {B. S.D.Ch S.} and Takahashi, {Y. K.} and T. Shiroyama and K. Hono",

year = "2014",

month = mar,

doi = "10.1016/j.ssc.2013.11.010",

language = "English",

volume = "182",

pages = "17--21",

journal = "Solid State Communications",

issn = "0038-1098",

publisher = "Elsevier Limited",

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TY - JOUR

T1 - Microstructure and magnetic properties of FePt-TiC-C granular thin films for perpendicular recording

AU - Cui, W. B.

AU - Varaprasad, B. S.D.Ch S.

AU - Takahashi, Y. K.

AU - Shiroyama, T.

AU - Hono, K.

PY - 2014/3

Y1 - 2014/3

N2 - By using TiC as the segregate, FePt-TiC and FePt-TiC-C thin films were prepared by co-sputtering onto strongly (002)-textured MgO/NiTa underlayer on thermally-oxidized Si substrates. The TiC effects on the microstructure and magnetic properties of L10 ordered FePt and FePt-C thin films were studied. The TiC segregate can refine the grain size of L10 ordered FePt. Coercivities and the degree of L10 ordering were degraded with increasing TiC concentration. By properly tuning the composition of TiC and C, the granular microstructure with average grain size of 10.3 nm and standard deviation of 1.86 nm can be achieved with the coercivity of 1.4 T. The balance between microstructure and magnetic properties indicates that mixture addition as the segregates is promising.

AB - By using TiC as the segregate, FePt-TiC and FePt-TiC-C thin films were prepared by co-sputtering onto strongly (002)-textured MgO/NiTa underlayer on thermally-oxidized Si substrates. The TiC effects on the microstructure and magnetic properties of L10 ordered FePt and FePt-C thin films were studied. The TiC segregate can refine the grain size of L10 ordered FePt. Coercivities and the degree of L10 ordering were degraded with increasing TiC concentration. By properly tuning the composition of TiC and C, the granular microstructure with average grain size of 10.3 nm and standard deviation of 1.86 nm can be achieved with the coercivity of 1.4 T. The balance between microstructure and magnetic properties indicates that mixture addition as the segregates is promising.

KW - A. L1-FePt

KW - B. Co-sputtering

KW - C. TEM

KW - D. Perpendicular anisotropy

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U2 - 10.1016/j.ssc.2013.11.010

DO - 10.1016/j.ssc.2013.11.010

M3 - Article

AN - SCOPUS:84891710545

SN - 0038-1098

VL - 182

SP - 17

EP - 21

JO - Solid State Communications

JF - Solid State Communications

ER -

Microstructure and magnetic properties of FePt-TiC-C granular thin films for perpendicular recording

Abstract

Keywords

ASJC Scopus subject areas

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