Room-temperature magnetic Heusler compound Fe2Ti0.5Co0.5Si with semiconducting behavior

Yunlong Jin, Yi Yang, Shah Valloppilly, Sy Hwang Liou, David J. Sellmyer

Research output: Contribution to journalArticle

Abstract

The structural, magnetic and electron-transport properties of Fe2Ti0.5Co0.5Si are investigated. It is demonstrated that rapidly quenched Fe2Ti0.5Co0.5Si ribbons crystallize in the L21 structure, indicating a full Heusler compound, and exhibit ferromagnetism with a high Curie temperature of about 790 K. Moreover, Fe2Ti0.5Co0.5Si exhibits semiconducting behavior with a negative temperature coefficient of resistivity, a room-temperature resistivity of about 6.5 mΩ cm and a residual resistivity ρ0 of about 6.75 mΩ cm. The carrier concentration n is 1.15 × 1020 cm−3 at 5 K. The magnetic semiconducting behavior with a high Curie temperature makes this material promising for room-temperature spintronic and magnetic applications.

Original languageEnglish (US)
Pages (from-to)343-346
Number of pages4
JournalJournal of Magnetism and Magnetic Materials
Volume474
DOIs
StatePublished - Mar 15 2019

Keywords

  • Heusler compound
  • High Curie temperature
  • Magnetic semiconducting behavior

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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