Pressure effect on the magnetic properties of the half-metallic Heusler alloy Co2TiSn

Iduru Shigeta; Yutaro Fujimoto; Ryutaro Ooka; Yuya Nishisako; Masahito Tsujikawa; Rie Y. Umetsu; Akiko Nomura; Kunio Yubuta; Yoshio Miura; Takeshi Kanomata; Masafumi Shirai; Jun Gouchi; Yoshiya Uwatoko; Masahiko Hiroi

doi:10.1103/PhysRevB.97.104414

Pressure effect on the magnetic properties of the half-metallic Heusler alloy Co2TiSn

Iduru Shigeta, Yutaro Fujimoto, Ryutaro Ooka, Yuya Nishisako, Masahito Tsujikawa, Rie Y. Umetsu, Akiko Nomura, Kunio Yubuta, Yoshio Miura, Takeshi Kanomata, Masafumi Shirai, Jun Gouchi, Yoshiya Uwatoko, Masahiko Hiroi

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

22 Citations (Scopus)

Abstract

Precise magnetization measurements of a half-metallic ferromagnet Co2TiSn with the Heusler type structure have been carried out under pressure up to 1.27 GPa. At ambient pressure, the spontaneous magnetic moment Msexp and the Curie temperature TCexp are experimentally obtained to be 1.993(3)μB/f.u. and 376.76(7) K, respectively. The Msexp is independent of applying pressure. The TCexp decreases with the increase of pressure and the pressure derivative of the Curie temperature dTCexp/dp is estimated to be -3.15(9) K/GPa. Furthermore, the pressure effect on the electronic and magnetic properties of Co2TiSn has been theoretically investigated on the basis of first-principles density functional calculations by using the projector augmented wave method in order to evaluate the half metallicity of Co2TiSn. Both the experimental and the theoretical results under pressure reveal that Co2TiSn is half metal. The experimental results of pressure-dependent magnetic properties are finally discussed on the basis of the spin fluctuation theory for itinerant electron magnetism.

Original language	English
Article number	104414
Journal	Physical Review B
Volume	97
Issue number	10
DOIs	https://doi.org/10.1103/PhysRevB.97.104414
Publication status	Published - 2018 Mar 21

Access to Document

10.1103/PhysRevB.97.104414

Cite this

@article{c5738391bda149c5abe3b8d589bc69b2,

title = "Pressure effect on the magnetic properties of the half-metallic Heusler alloy Co2TiSn",

abstract = "Precise magnetization measurements of a half-metallic ferromagnet Co2TiSn with the Heusler type structure have been carried out under pressure up to 1.27 GPa. At ambient pressure, the spontaneous magnetic moment Msexp and the Curie temperature TCexp are experimentally obtained to be 1.993(3)μB/f.u. and 376.76(7) K, respectively. The Msexp is independent of applying pressure. The TCexp decreases with the increase of pressure and the pressure derivative of the Curie temperature dTCexp/dp is estimated to be -3.15(9) K/GPa. Furthermore, the pressure effect on the electronic and magnetic properties of Co2TiSn has been theoretically investigated on the basis of first-principles density functional calculations by using the projector augmented wave method in order to evaluate the half metallicity of Co2TiSn. Both the experimental and the theoretical results under pressure reveal that Co2TiSn is half metal. The experimental results of pressure-dependent magnetic properties are finally discussed on the basis of the spin fluctuation theory for itinerant electron magnetism.",

author = "Iduru Shigeta and Yutaro Fujimoto and Ryutaro Ooka and Yuya Nishisako and Masahito Tsujikawa and Umetsu, {Rie Y.} and Akiko Nomura and Kunio Yubuta and Yoshio Miura and Takeshi Kanomata and Masafumi Shirai and Jun Gouchi and Yoshiya Uwatoko and Masahiko Hiroi",

note = "Funding Information: We would like to thank Y. Takahashi for useful discussions. The author acknowledges support by JSPS KAKENHI Grant No. JP16K04933. This work was performed under the Inter-University Cooperative Research Program (Proposal No. 16G0037) of the Cooperative Research and Development Center for Advanced Materials, Institute for Materials Research, Tohoku University. This work was carried out by the joint research in the Institute for Solid State Physics, the University of Tokyo. Publisher Copyright: {\textcopyright} 2018 American Physical Society.",

year = "2018",

month = mar,

day = "21",

doi = "10.1103/PhysRevB.97.104414",

language = "English",

volume = "97",

journal = "Physical Review B",

issn = "2469-9950",

publisher = "American Physical Society",

number = "10",

}

TY - JOUR

T1 - Pressure effect on the magnetic properties of the half-metallic Heusler alloy Co2TiSn

AU - Shigeta, Iduru

AU - Fujimoto, Yutaro

AU - Ooka, Ryutaro

AU - Nishisako, Yuya

AU - Tsujikawa, Masahito

AU - Umetsu, Rie Y.

AU - Nomura, Akiko

AU - Yubuta, Kunio

AU - Miura, Yoshio

AU - Kanomata, Takeshi

AU - Shirai, Masafumi

AU - Gouchi, Jun

AU - Uwatoko, Yoshiya

AU - Hiroi, Masahiko

N1 - Funding Information: We would like to thank Y. Takahashi for useful discussions. The author acknowledges support by JSPS KAKENHI Grant No. JP16K04933. This work was performed under the Inter-University Cooperative Research Program (Proposal No. 16G0037) of the Cooperative Research and Development Center for Advanced Materials, Institute for Materials Research, Tohoku University. This work was carried out by the joint research in the Institute for Solid State Physics, the University of Tokyo. Publisher Copyright: © 2018 American Physical Society.

PY - 2018/3/21

Y1 - 2018/3/21

N2 - Precise magnetization measurements of a half-metallic ferromagnet Co2TiSn with the Heusler type structure have been carried out under pressure up to 1.27 GPa. At ambient pressure, the spontaneous magnetic moment Msexp and the Curie temperature TCexp are experimentally obtained to be 1.993(3)μB/f.u. and 376.76(7) K, respectively. The Msexp is independent of applying pressure. The TCexp decreases with the increase of pressure and the pressure derivative of the Curie temperature dTCexp/dp is estimated to be -3.15(9) K/GPa. Furthermore, the pressure effect on the electronic and magnetic properties of Co2TiSn has been theoretically investigated on the basis of first-principles density functional calculations by using the projector augmented wave method in order to evaluate the half metallicity of Co2TiSn. Both the experimental and the theoretical results under pressure reveal that Co2TiSn is half metal. The experimental results of pressure-dependent magnetic properties are finally discussed on the basis of the spin fluctuation theory for itinerant electron magnetism.

AB - Precise magnetization measurements of a half-metallic ferromagnet Co2TiSn with the Heusler type structure have been carried out under pressure up to 1.27 GPa. At ambient pressure, the spontaneous magnetic moment Msexp and the Curie temperature TCexp are experimentally obtained to be 1.993(3)μB/f.u. and 376.76(7) K, respectively. The Msexp is independent of applying pressure. The TCexp decreases with the increase of pressure and the pressure derivative of the Curie temperature dTCexp/dp is estimated to be -3.15(9) K/GPa. Furthermore, the pressure effect on the electronic and magnetic properties of Co2TiSn has been theoretically investigated on the basis of first-principles density functional calculations by using the projector augmented wave method in order to evaluate the half metallicity of Co2TiSn. Both the experimental and the theoretical results under pressure reveal that Co2TiSn is half metal. The experimental results of pressure-dependent magnetic properties are finally discussed on the basis of the spin fluctuation theory for itinerant electron magnetism.

UR - http://www.scopus.com/inward/record.url?scp=85044463373&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85044463373&partnerID=8YFLogxK

U2 - 10.1103/PhysRevB.97.104414

DO - 10.1103/PhysRevB.97.104414

M3 - Article

AN - SCOPUS:85044463373

SN - 2469-9950

VL - 97

JO - Physical Review B

JF - Physical Review B

IS - 10

M1 - 104414

ER -

Pressure effect on the magnetic properties of the half-metallic Heusler alloy Co2TiSn

Abstract

Access to Document

Other files and links

Fingerprint

Cite this