Magnetic, Magnetocaloric, and Electric Transport Properties of Sr <sub>2</sub> FeMoO <sub>6–δ</sub> Double Perovskites with Different Degrees of Superstructural Ordering

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چکیده

Pressed strontium ferromolybdate (Sr2FeMoO6−δ) pellets with different oxygen indices δ and degrees of superstructural ordering (SO) are synthesized by solid-phase citrate-gel methods to study magnetic electric transport behaviors this compound. The crystalline structure the samples is found demonstrate Fe Mo cations, which increases increase in δ. saturation magnetization Curie temperature correlate degree SO. Banerjee criterion indicates that compounds studied undergo a second-order phase transition. dependence isothermal change entropy field determined Maxwell approach. additional low-temperature annealing sample conductivity metallic type for semiconducting one significantly magnetoresistance due intergrain electron tunneling.

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ژورنال

عنوان ژورنال: Physica Status Solidi B-basic Solid State Physics

سال: 2022

ISSN: ['1521-3951', '0370-1972']

DOI: https://doi.org/10.1002/pssb.202200021