Magnetic properties of hole-doped SCGO, SrCr8Ga4−xMxO19(M = Zn, Mg, Cu)
- 5 September 2011
- journal article
- Published by IOP Publishing in Journal of Physics: Condensed Matter
- Vol. 23 (38), 386001
- https://doi.org/10.1088/0953-8984/23/38/386001
Abstract
We report changes in the magnetic properties of hole-doped SCGO, SrCr8Ga4O19, induced by replacing non-magnetic Ga3+ with both non-magnetic (Mg2+ and Zn2+) and magnetic (Cu2+) cations. The resulting solid solutions, SrCr(8)Ga(4-x)M(x)O(19) (M = Zn, Mg, Cu) have been studied by x-ray diffraction and magnetic susceptibility measurements. For all cases, at least 10% of Ga can be replaced by divalent cations resulting in oxidation of ≥5% of the Cr3+ d3 to Cr4+ (d2). The hole doping results in an increase in ferromagnetic interactions and reduces the magnetic frustration. In the SrCr(8)Ga(4-x)Cu(x)O(19) series an enhancement of the spin-glass-like transition is observed, T(f)∼ 6 K, which we ascribe to the magnetic nature of the Cu2+ (d9) dopant.This publication has 27 references indexed in Scilit:
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