MnAs Nanocrystals Embedded in GaAs

• Authors: A. Kwiatkowski , D. Wasik , M. Kamińska , A. Twardowski , P. Dłużewski , J. Borysiuk , J. Sadowski
• Languages of publication: EN

Abstracts

EN

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).

Keywords

EN

75.20.-g; 75.75.+a

Discipline

• 75.20.-g: Diamagnetism, paramagnetism, and superparamagnetism

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2008
• Volume: 114
• Issue: 5
• Pages: 1207-1211

Dates

published

2008-11

received

2008-06-07

Contributors

author

A. Kwiatkowski

• Institute of Experimental Physics, University of Warsaw, Hoża 69, 00-681 Warsaw, Poland

author

D. Wasik

• Institute of Experimental Physics, University of Warsaw, Hoża 69, 00-681 Warsaw, Poland

author

M. Kamińska

• Institute of Experimental Physics, University of Warsaw, Hoża 69, 00-681 Warsaw, Poland

author

A. Twardowski

• Institute of Experimental Physics, University of Warsaw, Hoża 69, 00-681 Warsaw, Poland

author

P. Dłużewski

• Institute of Physics, PAS, al. Lotników 32/46, 02-668 Warsaw, Poland

author

J. Borysiuk

• Institute of Electronic Materials Technology, Wólczyńska 133, 01-919 Warsaw, Poland

author

J. Sadowski

• Institute of Physics, PAS, al. Lotników 32/46, 02-668 Warsaw, Poland
• MAX-Lab, Lund University, 221 00 Lund, Sweden

References

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Identifiers

DOI

10.12693/APhysPolA.114.1207