Co valence by K-edge X-ray absorption spectroscopy, magnetic properties, and structure of polycrystalline bulk Zn/sub 1-x/Co/sub x/O

Authors

Germanas Peleckis, University of WollongongFollow
Xiaolin Wang, University of WollongongFollow
R. S. Liu, National Taiwan University, TaiwanFollow
S. X. Dou, University of WollongongFollow

RIS ID

13711

Publication Details

This article was originally published as: Peleckis, G, Wang, XL, Liu, RS and Dou, Sx, Co valence by K-edge X-ray absorption spectroscopy, magnetic properties, and structure of polycrystalline bulk Zn/sub 1-x/Co/sub x/O, IEEE Transactions on Magnetics, October 2005, 41(10), 2727-2729. Copyright IEEE 2005.

Abstract

We report on magnetic properties and a Co K-edge X-ray absorption spectroscopy (XAS) study of polycrystalline bulk Zn_1-xCo_xO (x=0.10,0.15,0.17) samples. All samples show paramagnetic behavior and no ferromagnetism was observed. XAS results showed that for all samples the valence of Co is 2+. Spin state assessment derived from Currie-Weiss fitting indicated a possible spin state transition from Co²⁺ high spin to Co²⁺ low spin. Calculated μ_eff values for samples with x=0.10 and 0.15 indicated an orbital contribution to the effective magnetic moment of the Co ion.