journal article·2017-05-01Open access

The irreversible structural change in Mn1.1Fe0.9P0.8Ge0.2: Evidence for a magnetic driver

Xubo Liu, D. H. Ryan, L. M. D. Cranswick, D. M. Liu, H. G. Zhang, Ming Yue, Z. Altounian

AIP Advances· Volume 7· Issue 5

Abstract

Neutron powder diffraction measurements complemented by first-principles density functional theory (DFT) calculations have been used to study the irreversible change that accompanies the reversible magnetocaloric transition (MCT) in Mn1.1Fe0.9P0.8Ge0.2. We observe the growth and loss of long-period antiferromagnetism as we pass through the MCT for the first time and the development of significant strain in the cycled material. We attribute both the reversible and irreversible changes to the distance dependence of the Mn-Mn exchange in the Mn-P(Ge) ab–plane layers.
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Research context

OpenAlex topics: Magnetic and transport properties of perovskites and related materials · Rare-earth and actinide compounds · Shape Memory Alloy Transformations

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Affiliations

McGill University 1 Physics Department and Centre for the Physics of Materials, ,3600 University Street, Montreal, Quebec H3A 2T8, Canada

Chalk River Laboratories 2 Canadian Neutron Beam Centre, National Research Council Canada, , Chalk River, Ontario K0J 1J0, Canada

Beijing University of Technology 3 College of Materials Science and Engineering, , Beijing 100122, China

Funding

National Natural Science Foundation of China · Fonds de Recherche du Québec - Nature et Technologies · Natural Sciences and Engineering Research Council of Canada

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