Scanning Hall probe microscopy of a diluted magnetic semiconductor

Seongsoo Kweon, Nitin Samarth, Alex De Lozanne

Research output: Contribution to journalArticle

3 Scopus citations

Abstract

We have measured the micromagnetic properties of a diluted magnetic semiconductor as a function of temperature and applied field with a scanning Hall probe microscope built in our laboratory. The design philosophy for this microscope and some details are described. The samples analyzed in this work are Ga0.94 Mn0.06 As films grown by molecular beam epitaxy. We find that the magnetic domains are 2-4 μm wide and fairly stable with temperature. Magnetic clusters are observed above TC, which we ascribe to MnAs defects too small and sparse to be detected by a superconducting quantum interference device magnetometer.

Original languageEnglish (US)
Article number093906
JournalJournal of Applied Physics
Volume105
Issue number9
DOIs
StatePublished - Jun 22 2009

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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