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MnAs Nanocrystals Embedded in GaAs

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Author

  • A. Kwiatkowski
  • P. Dluzewski
  • J. Borysiuk
  • D. Wasik
  • M. Kaminska
  • A. Twardowski
  • Janusz Sadowski

Summary, in English

Magnetic properties of MnAs nanocrystals embedded in GaAs are analyzed in the frame of phenomenological model proposed by Sasaki for ferritin superparamagnets. Our calculations explain qualitatively experimental data of magnetization versus temperature; obtained according to zero-field-cooled and field-cooled protocols. They show dynamics of magnetization of MnAs nanocrystals in range of temperature from 10 K to 320 K. There is transition from state in which very slow dynamics is observed (frozen state) to state in which dynamics is fast (quasi-superparamagnetic state).

Department/s

Publishing year

2008

Language

English

Pages

1207-1211

Publication/Series

ACTA PHYSICA POLONICA A

Volume

114

Issue

5

Document type

Conference paper

Publisher

Polish Academy of Sciences

Topic

  • Physical Sciences
  • Natural Sciences

Conference name

37th International School on the Physics of Semiconducting Compounds

Conference date

2008-06-07 - 2008-06-13

Status

Published

ISBN/ISSN/Other

  • ISSN: 0587-4246