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arXiv · 1908.06450

Anomalous magnetic behavior and complex magnetic structure of proximate LaCrO3 LaFeO3 system

Brajesh Tiwari·Ambesh Dixit·M. S. Ramachandra Rao
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Abstract

We investigated complex magnetic properties of multifunctional LaCrO3-LaFeO3 system. The magnetic measurements substantiate the presence of competing complex magnetic ordering against temperature, showing paramagnetic to ferrimagnetic transition at 300 K, followed by antiferromagnetic (AFM) transition near 250 K superimposed on ferrimagnetic phase. The onset of weak ferrimagnetic ordering is attributed to the competing complex interaction between two AFM LaCrO3-LaFeO3 sublattices. The low-temperature AFM ordering is also substantiated by temperature-dependent Raman measurements, where the intensity ratio of 700 cm-1 Raman active mode showed the clear enhancement with lowering the temperature. The non-saturating nature of magnetic moments in LaCrO3-LaFeO6 suggests the predominating AFM ordering in conjunction with ferrimagnetic ordering between 250 K to 300 K up to 5 T magnetic field. A complex magnetic structure of LaCrO3-LaFeO3 is constructed, emphasizing the metastable magnetic phase near room temperature and low temperature antiferromagnetic state.

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Brajesh Tiwari, Ambesh Dixit, M. S. Ramachandra Rao. 2019-08-18. Anomalous magnetic behavior and complex magnetic structure of proximate LaCrO3 LaFeO3 system. https://arxiv.org/abs/1908.06450

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