Fe3Se4 : a possible ferrimagnetic half-metal?

Girish C. Tewari*, Divya Srivastava, Reijo Pohjonen, Otto Mustonen, Antti J. Karttunen, Johan Linden, Maarit Karppinen

*Corresponding author for this work

Research output: Contribution to journalArticle

Abstract

Half-metallic ferromagnets show 100% spin-polarization at the Fermi level and are ideal candidates for spintronic applications. Despite the extensive research in the field, very few materials have been discovered so far. Here, we present results of electronic band structure calculations based on density functional theory and extensive physical-property measurements for Fe(3)Se(4)revealing signatures of half-metallicity. The spin-polarized electronic band structure calculations predict half-metallic ferrimagnetism for Fe3Se4. The electrical resistivity follows exponentially suppressed electron-magnon scattering mechanism in the low-temperature regime and show a magnetoresistance effect that changes the sign from negative to positive with decreasing temperature around 100 K. Other intriguing observations include the anomalous behavior of Hall resistance below 100 K and an anomalous Hall coefficient that roughly follows the rho(2)behavior.

Original languageEnglish
Article number455801
Number of pages6
JournalJournal of physics: Condensed matter
Volume32
Issue number45
DOIs
Publication statusPublished - 28 Oct 2020
MoE publication typeA1 Journal article-refereed

Keywords

  • half-metal
  • ferrimagnetism
  • magnetotransport
  • anomalous Hall effect
  • NEUTRON-DIFFRACTION
  • FERROMAGNETS
  • SPINTRONICS
  • GAP

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