Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5460996 | Journal of Alloys and Compounds | 2017 | 23 Pages |
Abstract
Single phase polycrystalline sample of perovskite SrTi0.5Mn0.5O3 (STMO) has been successfully synthesized via solid state reaction route. Its detailed structural and physical properties have been studied using powder x-ray diffraction (XRD), transmission electron microscopy (TEM), magnetization, specific heat, and dielectric measurements. Rietveld analysis of the powder XRD data and TEM studies confirm that STMO is a disordered perovskite with Pm-3m space group in which titanium and manganese ions are randomly distributed at the 1b site. The dc magnetization (Ïdc-vs-T) measurements in the temperature range 2-300Â K reveal a single anomaly at â¼13Â K with predominant long range canted antiferromagnetic (AFM) ordering. The frequency invariant maximum at 13Â K in the ac susceptibility (Ïac-vs-T) data discards the spin-glass behavior. Despite the presence of sharp feature in magnetization data, the specific heat data (Cp-vs-T) shows only a broad hump around 13Â K, which has been attributed to the magneto-structural ordering giving rise to canted AFM state in chemically disorder STMO. Matching with the magnetic and specific heat anomaly, the dielectric permittivity also shows a broad anomaly around 13Â K, indicating the possible magneto-dielectric coupling in STMO system.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Shivani Sharma, K. Singh, R. Rawat, N.P. Lalla,