Magnetocaloric Effect and Magnetoresistance Due to Itinerant Electron Metamagnetic Transition in Co(S1-xSex)2

Hirofumi Wada, Daichi Kawasaki, Yoshiro Maekawa

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

The Co(S1-xSex)2 compounds with the cubic Pyrite structure show itinerant electron metamagnetism for 0.12≤ x. We studied the magnetocaloric effect and magnetoresistance (MR) of this system. It was found that a substantial magnetic entropy change was obtained for Co(S0.88Se0.12)2, which has a paramagnetic ground state. We observed giant positive MR associated with the itinerant electron metamagnetic transition for Co(S1-xSex)2. The magnitude of the MR jump is independent of temperature and concentration for 0.13≤ x≤ 0.15. These results are discussed in terms of a simple band structure of CoS2, in which high-spin polarization is realized in a ferromagnetic state.

Original languageEnglish
Article number6736118
JournalIEEE Transactions on Magnetics
Volume50
Issue number6
DOIs
Publication statusPublished - Jun 1 2014

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Magnetocaloric effects
Magnetoresistance
Electron transitions
Metamagnetism
Spin polarization
Pyrites
Band structure
Ground state
Entropy
Electrons
Temperature

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

Cite this

Magnetocaloric Effect and Magnetoresistance Due to Itinerant Electron Metamagnetic Transition in Co(S1-xSex)2. / Wada, Hirofumi; Kawasaki, Daichi; Maekawa, Yoshiro.

In: IEEE Transactions on Magnetics, Vol. 50, No. 6, 6736118, 01.06.2014.

Research output: Contribution to journalArticle

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