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Ferromagnetic ordering of Mn diluted into InAs(100) probed by x-ray magnetic circular dichroism

C. M. TEODORESCU1,* , M. C. RICHTER2, K. HRICOVINI2

Affiliation

  1. National Institute of Materials Physics, Atomistilor 105b, Magurele P. O. Box MG7, 077125 Romania
  2. Laboratoire de Physique des Matériaux et des Surfaces, Université de Cergy-Pontoise, 95031 Cergy-Pontoise France

Abstract

This work reports ferromagnetic ordering of manganese atoms diluted into InAs(100), as seen by X-ray magnetic circular dichroism (XMCD). Room-temperature grown Mn layers on InAs(100) are not magnetic, whereas upon annealing at 250 °C, Mn migrates into the semiconductor and exhibits a clear XMCD signal. The net ordered Mn magnetic moment is found to be about 0.7 B at low temperatures, whereas the Mn atoms are in a state characterized by a local spin of about 2 B. The temperature dependence of the Mn net magnetic moment gives a Curie temperature of more than 150 K, which is higher than the values reported so far for (In,Mn)As and (Ga, Mn)As diluted magnetic semiconductors..

Keywords

Diluted magnetic semiconductors, Manganese, Indium arsenide, X-ray magnetic circular dichroism, X-ray absorption.

Submitted at: March 20, 2006
Accepted at: May 18, 2006

Citation

C. M. TEODORESCU, M. C. RICHTER, K. HRICOVINI, Ferromagnetic ordering of Mn diluted into InAs(100) probed by x-ray magnetic circular dichroism, Journal of Optoelectronics and Advanced Materials Vol. 8, Iss. 3, pp. 1200-1205 (2006)