Magnetic phase evolution in the spinel compounds Zn1−xCoxCr2O4
作者： Jennifer E Drewes , Ram Seshadri , Arthur P Ramirez , Brent C Melot , E M Stoudenmire
DOI: 10.1088/0953-8984/21/21/216007
关键词: Condensed matter physics 、 Ferrimagnetism 、 Magnetic susceptibility 、 Materials science 、 Antiferromagnetism 、 Unpaired electron 、 Solid solution 、 Polar 、 Spinel 、 Magnetism
摘要: We present the magnetic properties of complete solid solutions ZnCr2O4 and CoCr2O4: two well studied oxide spinels with very different ground states. ZnCr2O4, non-magnetic d10 cations occupying A site d3 on B site, is a highly frustrated antiferromagnet. CoCr2O4, d7 (three unpaired electrons) as well, exhibits Neel ferrimagnetism commensurate incommensurate non-collinear order. More recently, CoCr2O4 has been extensively because its polar behavior which arises from conical ordering. Gradually introducing magnetism results in transition antiferromagnetism to glassy at low concentrations Co, eventually ferrimagnetic states higher concentrations. Real-space Monte Carlo simulations susceptibility suggest that first ordering features across x are captured by near-neighbor self-couplings cross-couplings between atoms. present, part this study, method for displaying temperature dependence manner helps distinguish compounds possessing purely antiferromagnetic interactions where other kinds present.
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