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Title: Bistability and relaxor ferrimagnetism in off-stoichiometric NiCrO3
Authors: Kusmartseva, Anna F.
Arevalo-Lopez, Angel M.
Halder, M.
Attfield, J. Paul
Issue Date: 2017
Publisher: © Elsevier
Citation: KUSMARTSEVA, A.F. ...et al., 2017. Bistability and relaxor ferrimagnetism in off-stoichiometric NiCrO3. Journal of Magnetism and Magnetic Materials, 443, pp. 293-299.
Abstract: © 2017 Elsevier B.V. NiCrO 3 has been proposed as a likely candidate for antiferromagnetic half metallic behaviour. A sample prepared at high pressure adopts the corundum structure with Ni/Cr cation disorder, and is found to have off-stoichiometric composition Ni 0.80 Cr 1.20 O 3 . This material shows complex local magnetic ordering phenomena at temperatures below 120 K but without any long range spin order observed by neutron diffraction. The transition to local ferrimagnetism occurs at 50–100 K, with two distinct regimes at T C1  = 95 and T C2  = 53 K evidencing electronic phase separation driven by variations in local composition. At low temperature the system undergoes a further transition at T C3  = 22 K, assigned to potential freezing of a cluster glass-like state, that results in a substantial increase in magnetic anisotropy. Ni 0.80 Cr 1.20 O 3 is a bistable relaxor ferrimagnet where magnetic properties are linked to the lattice strain manifold that is determined by the peculiarities in the local chemical composition.
Description: This paper is in closed access until 14th Jul 2018.
Sponsor: The work was supported by the Alexander von Humboldt Foundation and the Engineering and Physical Science Research Council (EPSRC).
Version: Accepted for publication
DOI: 10.1016/j.jmmm.2017.07.045
URI: https://dspace.lboro.ac.uk/2134/27516
Publisher Link: https://doi.org/10.1016/j.jmmm.2017.07.045
ISSN: 0304-8853
Appears in Collections:Closed Access (Physics)

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