Very high antiferromagnetic stability of L10-type MnIr alloys

R. Y. Umetsu; Y. Okamoto; M. Miyakawa; K. Sasao; K. Fukamichi; A. Sakuma

doi:10.1016/j.jmmm.2003.11.277

Very high antiferromagnetic stability of L1₀-type MnIr alloys

R. Y. Umetsu, Y. Okamoto, M. Miyakawa, K. Sasao, K. Fukamichi, A. Sakuma

Cooperative Research and Development Center for Advanced Materials

Research output: Contribution to journal › Conference article › peer-review

11 Citations (Scopus)

Abstract

In MnIr alloy system, the highest Néel temperature T_N among Mn alloy systems with an L1₀-type structure has been confirmed. The electronic specific heat coefficient γ is of 2-3mJmol ^-1K^-2 and almost independent of the Ir concentration. It is considered that the L1₀-type MnIr alloys are pseudo-gap-type antiferromagnets from the electrical resistivity and specific heat data, but the value of γ is larger than that of the L1₀-type equiatomic MnPt alloy. These experimental results are in accord with the calculated band structures.

Original language	English
Pages (from-to)	790-791
Number of pages	2
Journal	Journal of Magnetism and Magnetic Materials
Volume	272-276
DOIs	https://doi.org/10.1016/j.jmmm.2003.11.277
Publication status	Published - 2004 May
Event	Proceedings of the International Conference on Magnetism - Rome, Italy Duration: 2003 Jul 27 → 2003 Aug 1

Keywords

Band structure
Effective exchange constant
Electronic specific heat coefficient
Néel temperature

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

Access to Document

10.1016/j.jmmm.2003.11.277

Cite this

@article{fe6723fa568f474f9e8dd225447a76a0,

title = "Very high antiferromagnetic stability of L10-type MnIr alloys",

abstract = "In MnIr alloy system, the highest N{\'e}el temperature TN among Mn alloy systems with an L10-type structure has been confirmed. The electronic specific heat coefficient γ is of 2-3mJmol -1K-2 and almost independent of the Ir concentration. It is considered that the L10-type MnIr alloys are pseudo-gap-type antiferromagnets from the electrical resistivity and specific heat data, but the value of γ is larger than that of the L10-type equiatomic MnPt alloy. These experimental results are in accord with the calculated band structures.",

keywords = "Band structure, Effective exchange constant, Electronic specific heat coefficient, N{\'e}el temperature",

author = "Umetsu, {R. Y.} and Y. Okamoto and M. Miyakawa and K. Sasao and K. Fukamichi and A. Sakuma",

note = "Funding Information: The present work was supported by a Grant-in-Aid for Scientific Research (B)(2), No. 13450225, from the Japan Society for the Promotion of Science.; Proceedings of the International Conference on Magnetism ; Conference date: 27-07-2003 Through 01-08-2003",

year = "2004",

month = may,

doi = "10.1016/j.jmmm.2003.11.277",

language = "English",

volume = "272-276",

pages = "790--791",

journal = "Journal of Magnetism and Magnetic Materials",

issn = "0304-8853",

publisher = "Elsevier",

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TY - JOUR

T1 - Very high antiferromagnetic stability of L10-type MnIr alloys

AU - Umetsu, R. Y.

AU - Okamoto, Y.

AU - Miyakawa, M.

AU - Sasao, K.

AU - Fukamichi, K.

AU - Sakuma, A.

N1 - Funding Information: The present work was supported by a Grant-in-Aid for Scientific Research (B)(2), No. 13450225, from the Japan Society for the Promotion of Science.

PY - 2004/5

Y1 - 2004/5

N2 - In MnIr alloy system, the highest Néel temperature TN among Mn alloy systems with an L10-type structure has been confirmed. The electronic specific heat coefficient γ is of 2-3mJmol -1K-2 and almost independent of the Ir concentration. It is considered that the L10-type MnIr alloys are pseudo-gap-type antiferromagnets from the electrical resistivity and specific heat data, but the value of γ is larger than that of the L10-type equiatomic MnPt alloy. These experimental results are in accord with the calculated band structures.

AB - In MnIr alloy system, the highest Néel temperature TN among Mn alloy systems with an L10-type structure has been confirmed. The electronic specific heat coefficient γ is of 2-3mJmol -1K-2 and almost independent of the Ir concentration. It is considered that the L10-type MnIr alloys are pseudo-gap-type antiferromagnets from the electrical resistivity and specific heat data, but the value of γ is larger than that of the L10-type equiatomic MnPt alloy. These experimental results are in accord with the calculated band structures.

KW - Band structure

KW - Effective exchange constant

KW - Electronic specific heat coefficient

KW - Néel temperature

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DO - 10.1016/j.jmmm.2003.11.277

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AN - SCOPUS:2642519045

VL - 272-276

SP - 790

EP - 791

JO - Journal of Magnetism and Magnetic Materials

JF - Journal of Magnetism and Magnetic Materials

SN - 0304-8853

T2 - Proceedings of the International Conference on Magnetism

Y2 - 27 July 2003 through 1 August 2003

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