Volume 256, Issue 11 1900019
Original Paper

Influence of Cation Order and Valence States on Magnetic Ordering in La2Ni1−xMn1+xO6

Mohd. Nasir

Mohd. Nasir

Department of Physics, Indian Institute of Technology Indore, Indore 453552, India

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Mahmud Khan

Mahmud Khan

Department of Physics, Miami University, Oxford 45056, Ohio

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Subhash Bhatt

Subhash Bhatt

Department of Physics, Miami University, Oxford 45056, Ohio

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Anup Kumar Bera

Anup Kumar Bera

Solid State Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India

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Mohammad Furquan

Mohammad Furquan

Center for Research in Nanotechnology and Science, Indian Institute of Technology Bombay, Mumbai 400076, India

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Sunil Kumar

Sunil Kumar

Discipline of Metallurgy Engineering and Materials Science, Indian Institute of Technology Indore, Indore 453552, India

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Sk. Mohammad Yusuf

Sk. Mohammad Yusuf

Solid State Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India

Homi Bhabha National Institute, Anushaktinagar, Mumbai 400 094, India

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Nirmalendu Patra

Nirmalendu Patra

Atomic & Molecular Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India

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Dibyendu Bhattacharya

Dibyendu Bhattacharya

Atomic & Molecular Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India

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Shambhu Nath Jha

Shambhu Nath Jha

Atomic & Molecular Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India

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Shun-Wei Liu

Shun-Wei Liu

Ming Chi University, New Taipei City 24301, Taiwan

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Sajal Biring

Sajal Biring

Ming Chi University, New Taipei City 24301, Taiwan

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Somaditya Sen

Corresponding Author

Somaditya Sen

Department of Physics, Indian Institute of Technology Indore, Indore 453552, India

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First published: 11 June 2019
Citations: 18

Abstract

Among multifunctional double perovskite oxides, La2NiMnO6 has recently drawn significant attention due to its importance both in terms of understanding of fundamental physics and potential for device applications. The relative alteration in Ni:Mn ratio strongly influences the structural and magnetic properties of La2NiMnO6. The cation ratio and degree of cation order significantly affect the magnetic coupling of the two B-site cations in these compounds. In the present study, La2Ni1−xMn1+xO6 (x = −0.25, 0, 0.25) samples with different Ni:Mn ratio have been prepared using sol–gel method and modifications of the above physical properties from that of a stoichiometric sample of La2NiMnO6 are discussed. The crystalline structures of the samples varied with different ionic ratios. While all samples exhibited ferromagnetic behavior, long-range Ni/Mn magnetic ordering was detected in selected samples only. The experimental values of saturation magnetization were smaller than the theoretical spin-only moments, which suggests a less ordered state for all samples. Due to an increased antiferromagnetic interaction caused by antisite disorders, the saturation magnetization decreases while the coercive field increases with decreasing Mn content.

Conflict of Interest

The authors declare no conflict of interest.

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