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Growth and properties of ferromagnetic In1-xMnxSb alloys

  • T. Wojtowicz
  • , W. L. Lim
  • , X. Liu
  • , G. Cywiński
  • , M. Kutrowski
  • , L. V. Titova
  • , K. Yee
  • , M. Dobrowolska
  • , J. K. Furdyna
  • , K. M. Yu
  • , W. Walukiewicz
  • , G. B. Kim
  • , M. Cheon
  • , X. Chen
  • , S. M. Wang
  • , H. Luo
  • , I. Vurgaftman
  • , J. R. Meyer
  • University of Notre Dame
  • Institute of Physics of the Polish Academy of Sciences
  • Lawrence Berkeley National Laboratory
  • SUNY Buffalo
  • Naval Research Laboratory

Research output: Contribution to journalConference articlepeer-review

33 Scopus citations

Abstract

We discuss a new narrow-gap ferromagnetic (FM) semiconductor alloy, In 1-xMnxSb, and its growth by low-temperature molecular-beam epitaxy. The magnetic properties were investigated by direct magnetization measurements, electrical transport, magnetic circular dichroism, and the magneto-optical Kerr effect. These data clearly indicate that In 1-xMnxSb possesses all the attributes of a system with carrier-mediated FM interactions, including well-defined hysteresis loops, a cusp in the temperature dependence of the resistivity, strong negative magnetoresistance, and a large anomalous Hall effect. The Curie temperatures in samples investigated thus far range up to 8.5 K, which are consistent with a mean-field-theory simulation of the carrier-induced ferromagnetism based on the 8-band effective band-orbital method.

Original languageEnglish
Pages (from-to)325-332
Number of pages8
JournalPhysica E: Low-Dimensional Systems and Nanostructures
Volume20
Issue number3-4
DOIs
StatePublished - Jan 2004
EventProceedings of the 11th International Conference on Narrow Gap - Buffalo, NY., United States
Duration: Jun 16 2003Jun 20 2003

Keywords

  • Anomalous Hall effect
  • Ferromagnetic semiconductors
  • InMnSb
  • Magnetic circular dichroism
  • Magnetization
  • Magneto-optical Kerr effect
  • PBS
  • PIXE

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