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- Title
Revealing the Formation Mechanism and Effect of Pressure on the Magnetic Order of Multiferroic BiMnO Through Neutron Powder Diffraction.
- Authors
Dang, N.; Kozlenko, D.; Kichanov, S.; Jabarov, S.; Mammadov, A.; Mekhtieva, R.; Phan, T.; Smotrakov, V.; Eremkin, V.; Savenko, B.
- Abstract
The crystal and magnetic structures of the strong magnetoelectric BiMnO have been studied as a function of pressure up to 5.7 GPa in the temperature range from 10 K to 60 K by means of neutron powder diffraction. The results reveal that the Pbam orthorhombic crystal structure remains unchanged in the investigated thermodynamic range. At ambient pressure, a long-range commensurate antiferromagnetic (AFM) phase with propagation vector q = (1/2, 0, 1/2) formed below T = 41(2) K, accompanied by anomalies in the temperature dependence of structural parameters including the lattice parameters, interatomic distances, and bond angles. This AFM phase remained stable␣in the studied pressure range, and the relevant pressure coefficient of the Néel temperature was determined to be 3.0(4) K/GPa. No incommensurate AFM phase was detected. The magnetic properties of BiMnO and their difference from most other RMnO compounds were analyzed in terms of competing exchange interactions.
- Subjects
MAGNETIC structure; CRYSTAL structure; THERMODYNAMICS; ANTIFERROMAGNETIC materials; LATTICE constants
- Publication
Journal of Electronic Materials, 2017, Vol 46, Issue 6, p3373
- ISSN
0361-5235
- Publication type
Article
- DOI
10.1007/s11664-017-5351-x