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EPR and magnetic properties of vapour phase grown Cd1-xFexTe single crystals

J. SUBRAMANYAM1,* , B. K. REDDY2, N. MADHUSUDHANA RAO3, G. KRISHNAIAH4

Affiliation

  1. Department of Physics, NBKR Arts and Science College, Vidyanagar-524413, India
  2. Department of Physics, S.V. University, Tirupati-517 502, India
  3. School of Advanced Sciences, VIT University, Vellore-632 014, TamilNadu, India
  4. Department of Physics, Govt. Degree College, Puttur – 517 583, India

Abstract

EPR spectra were carried out at room temperature for vapour phase grown Cd1-xFexTe (0≤x≤0.003) diluted magnetic semiconducting single crystals in the frequency range 8.8-9.6 GHz. The results confirm the presence of uncoupled Fe3+ in the samples of all compositions with characteristic g-value around 2.002 ± 0.001, giving rise to the associated paramagnetic behaviour. The line width (H) decreased as composition of ‘Fe’ increased due to dipole-dipole interaction between Fe3+ ions and the number of spins also decreased linearly with increasing Fe content. The magnetic studies on Cd1-xFexTe samples of all compositions revealed the Van Vleck type of paramagnetism of crystals..

Keywords

II-VI Diluted Magnetic Semiconductors, Vapour growth technique, Electron paramagnetic, Resonance, Cd1-xFexTe Single crystals.

Citation

J. SUBRAMANYAM, B. K. REDDY, N. MADHUSUDHANA RAO, G. KRISHNAIAH, EPR and magnetic properties of vapour phase grown Cd1-xFexTe single crystals, Optoelectronics and Advanced Materials - Rapid Communications, 9, 11-12, November-December 2015, pp.1425-1428 (2015).

Submitted at: March 21, 2013

Accepted at: Oct. 28, 2015