論文

査読有り
2022年10月

Realization of efficient tuning of the Fermi level in iron-based ferrimagnetic alloys

Physical Review Materials
  • N. Yamashita
  • ,
  • E. Shigematsu
  • ,
  • S. Honda
  • ,
  • R. Ohshima
  • ,
  • M. Shiraishi
  • ,
  • Y. Ando

6
10
記述言語
掲載種別
研究論文(学術雑誌)
DOI
10.1103/PhysRevMaterials.6.104405

The Stoner criterion allows only three single elements possessing room-temperature (RT) ferromagnetism: cobalt (Co), nickel (Ni), and iron (Fe). Although these three elements have played central roles in magnetism-based materials, their large work function (4.5∼5.2eV) is becoming a non-negligible obstacle for realization of spin devices using nonmetallic materials with finite energy gaps, because injection of electron spins into these nonmetallic materials is strongly hampered due to the large Schottky barrier height. Hence, a novel ferromagnetic or ferrimagnetic material simultaneously possessing RT ferromagnetism or ferrimagnetism and high Fermi energy is strongly required. Here, we show that an Fe-based alloy, iron-gadolinium (FeGd), allows circumvention of the obstacle. Surprisingly, only 20% of Gd incorporation in Fe dramatically modulates the Fermi energy from -4.8 to -3.0 eV, which is the largest modulation in all metallic alloys reported thus far. The coexistence of ferrimagnetism and nonzero spin polarization at RT of FeGd supports its abundant potential for future applications in low-carrier-density materials such as monolayer, organic, and nondegenerate inorganic semiconductors.

リンク情報
DOI
https://doi.org/10.1103/PhysRevMaterials.6.104405
Scopus
https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85140246404&origin=inward
Scopus Citedby
https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=85140246404&origin=inward
ID情報
  • DOI : 10.1103/PhysRevMaterials.6.104405
  • eISSN : 2475-9953
  • ORCIDのPut Code : 120632905
  • SCOPUS ID : 85140246404

エクスポート
BibTeX RIS