Study of magnetic properties of A2B′NbO6 (A=Ba,Sr,BaSr; and B′=Fe and Mn) double perovskites

Rama, N.; Philipp, J. B.; Opel, M.; Chandrasekaran, K.; Sankaranarayanan, V.; Gross, R.; Rao, M. S. Ramachandra

doi:10.1063/1.1682952

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Research Article| June 01 2004

Study of magnetic properties of $A_{2} B^{'} {NbO}_{6}$ $(A= Ba,Sr,BaSr;$ and $B^{'} = Fe$ and Mn) double perovskites

N. Rama;

N. Rama

Materials Science Research Centre, Indian Institute of Technology Madras, Chennai-600036, India

Department of Physics, Indian Institute of Technology Madras, Chennai-600036, India

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J. B. Philipp;

J. B. Philipp

Walther-Meissner Institute, Walther-Meissner Strasse 8, Garching D-85748, Germany

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M. Opel;

M. Opel

Walther-Meissner Institute, Walther-Meissner Strasse 8, Garching D-85748, Germany

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K. Chandrasekaran;

K. Chandrasekaran

Materials Science Research Centre, Indian Institute of Technology Madras, Chennai-600036, India

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V. Sankaranarayanan;

V. Sankaranarayanan

Department of Physics, Indian Institute of Technology Madras, Chennai-600036, India

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R. Gross;

R. Gross

Walther-Meissner Institute, Walther-Meissner Strasse 8, Garching D-85748, Germany

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M. S. Ramachandra Rao

Materials Science Research Centre, Indian Institute of Technology Madras, Chennai-600036, India

Department of Physics, Indian Institute of Technology Madras, Chennai-600036, India

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Author & Article Information

N. Rama ^,

,

J. B. Philipp

,

M. Opel

,

K. Chandrasekaran

,

V. Sankaranarayanan

,

R. Gross

,

M. S. Ramachandra Rao ^,

Materials Science Research Centre, Indian Institute of Technology Madras, Chennai-600036, India

J. Appl. Phys. 95, 7528–7530 (2004)

https://doi.org/10.1063/1.1682952

We have studied the magnetic properties of ${Ba}_{2} {FeNbO}_{6}$ and ${Ba}_{2} {MnNbO}_{6} .$ It is seen that ${Ba}_{2} {FeNbO}_{6}$ is an antiferromagnet with a weak ferromagnetic behavior at 5 K while ${Ba}_{2} {MnNbO}_{6}$ shows two magnetic transitions, one at 45 K and the other at 12 K. Electron spin resonance measurements at room temperature show that the Mn compound does not show any Jahn-Teller distortion. It is also seen that the Neel temperatures of the $A_{2} {FeNbO}_{6}$ $(A= Ba,Sr,BaSr)$ 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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Study of magnetic properties of $A_{2} B^{'} {NbO}_{6}$ $(A= Ba,Sr,BaSr;$ and $B^{'} = Fe$ and Mn) double perovskites

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Study of magnetic properties of $A_{2} B^{'} {NbO}_{6}$ $(A= Ba,Sr,BaSr;$ and $B^{'} = Fe$ and Mn) double perovskites