Magnetic phase transition in the new double-perovskite Ca2CoOsO6
Osmates in the perovskite-like structure are very topical. For example, recent discoveries include Slater transitions, and "ferroelectric-like" structural transitions. These arise because of structural distortions, geometric frustration, magnetism and strong spin-orbit coupling. We have recently synthesised a new monoclinic (P21/n) double perovskite material Ca2CoOsO6 using a high pressure method. Bulk measurements show evidence for a ferrimagnetic phase transition at approximately 130K. We propose to determine the magnetic and crystal structure of ca2CoOsO6 as a function of temperature between 10 and 300K, with a particular view to disentangling the sublattice contributions to the magnetic structure and investigating the contribution of the osmium orbital moment to the magnetic properties.
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PRINCEP Andrew; BOOTHROYD Andrew Timothy; GUO Yanfeng; PRABHAKARAN Dharmalingam; Marein C. Rahn and SUARD Emmanuelle. (2014). Magnetic phase transition in the new double-perovskite Ca2CoOsO6. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.5-31-2343
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