Extrinsic Substrate Orientation Dependence of Ferromagnetism in (Ga,Mn)As Digital Ferromagnetic Heterostructures

Abstract

We describe the structural and magnetic properties of digital ferromagnetic heterostructures of (Ga,Mn)As grown on (001), (311), (201) and (110) GaAs surfaces. Our measurements show a systematic variation of the Curie temperature with epitaxial orientation for samples with a nominally identical structure. Control measurements of randomly alloyed (Ga,Mn)As grown on these substrates show identical trends in Curie temperature, suggesting that the substrate orientation plays a strong role in the formation of hole-compensating defects in this ferromagnetic semiconductor.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Oct 01, 2008
Accession Number
ADA499923

Entities

People

  • B. L. Sheu
  • G. Xiang
  • M. J. Wilson
  • N. Samarth
  • P. Schiffer

Organizations

  • Pennsylvania State University

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Abstracts
  • Curie Temperature
  • Department Of Defense
  • Engineering
  • Epitaxial Growth
  • Heterojunctions
  • Magnetic Fields
  • Magnetic Properties
  • Magnetometers
  • Materials
  • Materials Science
  • Measurement
  • Orientation (Direction)
  • Semiconductor Devices
  • Semiconductors
  • Students
  • Substrates

Fields of Study

  • Materials science

Readers

  • Semiconductor Device Technology
  • Superconducting Magnet Technology

Technology Areas

  • Microelectronics
  • Microelectronics - Graphene