Phase stability and magnetic properties of L21 phase in Co2Mn(Al1-xSix) Heusler alloys

Rie Y. Umetsu; Kosei Kobayashi; Asaya Fujita; Ryosuke Kainuma; Kiyohito Ishida

doi:10.1016/j.scriptamat.2007.12.001

Phase stability and magnetic properties of L2₁ phase in Co₂Mn(Al_1-xSi_x) Heusler alloys

Rie Y. Umetsu, Kosei Kobayashi, Asaya Fujita, Ryosuke Kainuma, Kiyohito Ishida

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

31 Citations (Scopus)

Abstract

The phase stability and magnetic properties of the L2₁ phase in Co₂Mn(Al_1-xSi_x) Heusler alloys were investigated. The order-disorder phase transition temperature, T_t^{L 21 / B 2}, increases linearly with increasing x; T_t^{L 21 / B 2} for Co₂MnSi is estimated to be about 1580 K. These results mean that the stability of L2₁ phase of Co₂MnSi is much higher than that of Co₂MnAl. Although the saturation magnetic moment increases linearly with increasing x, i.e., consistent with the generalized Slater-Pauling behavior, the Curie temperature increases, exhibiting slightly upward convexity.

Original language	English
Pages (from-to)	723-726
Number of pages	4
Journal	Scripta Materialia
Volume	58
Issue number	9
DOIs	https://doi.org/10.1016/j.scriptamat.2007.12.001
Publication status	Published - 2008 May

Keywords

Half-metal ferromagnets
Heusler phases
Magnetic properties
Microstructure
Order-disorder phenomena

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Metals and Alloys

Access to Document

10.1016/j.scriptamat.2007.12.001

Cite this

@article{bc6465c11e0d4ec5b9fa54398a80307a,

title = "Phase stability and magnetic properties of L21 phase in Co2Mn(Al1-xSix) Heusler alloys",

abstract = "The phase stability and magnetic properties of the L21 phase in Co2Mn(Al1-xSix) Heusler alloys were investigated. The order-disorder phase transition temperature, TtL 21 / B 2, increases linearly with increasing x; TtL 21 / B 2 for Co2MnSi is estimated to be about 1580 K. These results mean that the stability of L21 phase of Co2MnSi is much higher than that of Co2MnAl. Although the saturation magnetic moment increases linearly with increasing x, i.e., consistent with the generalized Slater-Pauling behavior, the Curie temperature increases, exhibiting slightly upward convexity.",

keywords = "Half-metal ferromagnets, Heusler phases, Magnetic properties, Microstructure, Order-disorder phenomena",

author = "Umetsu, {Rie Y.} and Kosei Kobayashi and Asaya Fujita and Ryosuke Kainuma and Kiyohito Ishida",

note = "Funding Information: This work was supported by a Grant-in-Aid for Core Research for Evolutional Science and Technology (CREST), Japan Science and Technology Agency (JST), by a Grant-in-Aid for Scientific Research (S), No. 18106012, and by a Global Center of Excellence (GCOE) grant from the Japan Society for the Promotion of Science (JSPS). ",

year = "2008",

month = may,

doi = "10.1016/j.scriptamat.2007.12.001",

language = "English",

volume = "58",

pages = "723--726",

journal = "Scripta Materialia",

issn = "1359-6462",

publisher = "Elsevier Limited",

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TY - JOUR

T1 - Phase stability and magnetic properties of L21 phase in Co2Mn(Al1-xSix) Heusler alloys

AU - Umetsu, Rie Y.

AU - Kobayashi, Kosei

AU - Fujita, Asaya

AU - Kainuma, Ryosuke

AU - Ishida, Kiyohito

N1 - Funding Information: This work was supported by a Grant-in-Aid for Core Research for Evolutional Science and Technology (CREST), Japan Science and Technology Agency (JST), by a Grant-in-Aid for Scientific Research (S), No. 18106012, and by a Global Center of Excellence (GCOE) grant from the Japan Society for the Promotion of Science (JSPS).

PY - 2008/5

Y1 - 2008/5

N2 - The phase stability and magnetic properties of the L21 phase in Co2Mn(Al1-xSix) Heusler alloys were investigated. The order-disorder phase transition temperature, TtL 21 / B 2, increases linearly with increasing x; TtL 21 / B 2 for Co2MnSi is estimated to be about 1580 K. These results mean that the stability of L21 phase of Co2MnSi is much higher than that of Co2MnAl. Although the saturation magnetic moment increases linearly with increasing x, i.e., consistent with the generalized Slater-Pauling behavior, the Curie temperature increases, exhibiting slightly upward convexity.

AB - The phase stability and magnetic properties of the L21 phase in Co2Mn(Al1-xSix) Heusler alloys were investigated. The order-disorder phase transition temperature, TtL 21 / B 2, increases linearly with increasing x; TtL 21 / B 2 for Co2MnSi is estimated to be about 1580 K. These results mean that the stability of L21 phase of Co2MnSi is much higher than that of Co2MnAl. Although the saturation magnetic moment increases linearly with increasing x, i.e., consistent with the generalized Slater-Pauling behavior, the Curie temperature increases, exhibiting slightly upward convexity.

KW - Half-metal ferromagnets

KW - Heusler phases

KW - Magnetic properties

KW - Microstructure

KW - Order-disorder phenomena

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U2 - 10.1016/j.scriptamat.2007.12.001

DO - 10.1016/j.scriptamat.2007.12.001

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JO - Scripta Materialia

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