pISSN 0374-4914 eISSN 2289-0041

Research Paper

New Physics: Sae Mulli 2006; 53: 608-612

Published online December 30, 2006

Magnetic Properties of Zn$_{1-x}$Fe$_x$O

S. R. LEE, E. C. KIM,* T. H. KIM, S. J. KIM, Y. G. JOH and D. H. KIM

Department. of Physics, Yeungnam University, Gyongsan 712-749

Correspondence to:eckim@yumail.ac.kr

Abstract

Recently, the II-VI semiconductor ZnO, normally n-type, doped with magnetic impurities was reported to be ferromagnetic above room temperature. Since ZnO is optically transparent, ferromagnetic ZnO should a transparent magnet as well. The purpose of this study was to carry out Mossbauer, X-ray and magnetic-susceptibility measurements on Zn$_{0.99}$Fe$_{0.01}$O to examine its magnetic properties and to separate the contributions of the ferromagnetic and the paramagnetic phases to the magnetization. The X-rat diffraction (XRD) data for Zn$_{0.99}$Fe$_{0.01}$O showed a typical hexagonal structure, with no indication of a secondary phase. The magnetic hysteresis (M-H) curve at room temperature showed an obvious ferromagnetic behavior, and the magnetic moment per Fe atom under an applied field of 0.8 T was estimated to be about 2 ${mu}$B, suggesting a low spin configuration of Fe ions. Mossbauer spectra of Zn$_{0.99}$Fe$_{0.01}$O have been taken at various temperatures ranging from 100 to 300 K. The Mossbauer spectrum of Zn$_{0.99}$Fe$_{0.01}$O consists of a ferromagnetic (six-Lorentzian) and a paramagnetic phase (doublet).

Keywords: Zn$_{1-x}$Fe$_x$O, Mossbauer, Magnetic properties