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arXiv · 2103.06305

Crystal Growth of a New 8H Perovskite Sr8Os6.3O24 Exhibiting High TC Ferromagnetism

Gohil S. Thakur·Thomas Doert·Shrikant Mohitkar·Walter Schnelle·Claudia Felser·Martin Jansen
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Abstract

Single crystals of a new twinned hexagonal perovskite compound Sr8Os6.3O24 have been synthesized, and structural and magnetic properties have been determined. The compound crystallizes in a hexagonal cell with lattice parameters a = 9.6988(3) {\AA} and c = 18.1657(5) {\AA}. The structure is an eight-layered hexagonal B-site deficient perovskite with the layer sequence (ccch)2 and represents the first example of a hexagonal structure among 5d oxides adopting a twin option. The sample shows spontaneous ferromagnetic magnetization below 430 K with a small saturation moment of 0.11 {\mu}B/Os ion. This is the highest Curie temperature (TC) reported for any bulk perovskite containing only 5d ions at the B site.

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Gohil S. Thakur, Thomas Doert, Shrikant Mohitkar, Walter Schnelle, Claudia Felser, Martin Jansen. 2021-03-10. Crystal Growth of a New 8H Perovskite Sr8Os6.3O24 Exhibiting High TC Ferromagnetism. https://arxiv.org/abs/2103.06305

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