A computational study on magnetic effects of Zn1-xCrxO type diluted magnetic semiconductor


Duru I. P. , Deger C. , Kalayci T., Arucu M.

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, vol.396, pp.268-274, 2015 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 396
  • Publication Date: 2015
  • Doi Number: 10.1016/j.jmmm.2015.08.031
  • Title of Journal : JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
  • Page Numbers: pp.268-274
  • Keywords: Diluted magnetic semiconductors, Exchange-bias, Soft ferromagnetism, Monte Carlo simulation, EXCHANGE BIAS, ZNO, FERROMAGNETISM, CR, NANOCRYSTALS, FILMS

Abstract

Diluted magnetic semiconductors (DMS) have been intensely investigated both experimentally and theoretically in recent years. In spite of large body of studies to have a better understanding on working principles of devices based on DMS materials and taking a detailed control during fabrication process, nature of the system remains largely unknown It is proposed that dominant contribution to DMS Hamiltonian is originated from ferromagnetic interaction between antiferromagnetic Cr+3 and its nearest neighbors rather than long-range interactions which commonly reported. In the light of experimental data obtained from literature, we simulated Zn1-xCrxO wurtzite thin film based on Metropolis algorithm and Markov Chain Monte Carlo (MC-MC) method as realistic as possible. We found that the soft ferromagnetic behaviour of Zn1-xCrxO thin film emerges by increasing doping ratios up to 15% (x=0.15), then it gradually vanishes above 15% (x=0.15) at room temperature. Results obtained here was found to be highly consistent with experimental studies. (C) 2015 Elsevier B.V. All rights reserved.