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arxiv: cond-mat/0405557 · v1 · submitted 2004-05-24 · ❄️ cond-mat.str-el

Study of Magnetic Properties of A₂B^'NbO₆ (A=Ba,Sr, (BaSr): and B^'=Fe and Mn) double perovskites

N. Rama , J.B. Philipp , M. Opel , K. Chandrasekaran , V. Sankaranarayanan , R. Gross , M.S. Ramachandra Rao This is my paper
classification ❄️ cond-mat.str-el
keywords fenbomagneticbasrmnnbopropertiesseentemperaturea-site
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We have studied the magnetic properties of Ba_2FeNbO_6 and Ba_2MnNbO_6. it is seen that Ba_2FeNbO_6 is an antiferromagnet with a weak ferromagnetic behaviour at 5K while Ba_2MnNbO_6 shows two magnetic transitions one at 45 K and the other at 12K. Electron spin resonance (ESR) measurements at room temperature show that the Mn compound does not show any Jahn-Teller distortion. It is also seen that the Neel temperature of the A_2FeNbO_6 (A=Ba,Sr, BaSr) compounds do not vary significantly. However variations in the average A-site ionic radius influence the formation of short range correlations that persist above T_N.

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