Magnetic and electronic properties of magnetite across the high pressure anomaly

The magnetite Fe 3 O 4 , being anciently known magnetic material to human kind and remaining in leading positions for development of advanced technologies presently, demonstrates a number of puzzling physical phenomena, being at focus of extensive research for more than century. Recently the pressur...

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Bibliographic Details
Published in:Scientific reports 2019-03, Vol.9 (1), p.4464-4464, Article 4464
Main Authors: Kozlenko, D. P., Dubrovinsky, L. S., Kichanov, S. E., Lukin, E. V., Cerantola, V., Chumakov, A. I., Savenko, B. N.
Format: Article
Language:English
Subjects:
639/766/119/2795
639/766/119/995
639/766/119/997
High pressure
Humanities and Social Sciences
Iron oxides
Magnetite
multidisciplinary
Neutron diffraction
Phase transitions
Physical properties
Physics
Pressure
Science
Science (multidisciplinary)
Spectroscopy
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Summary:The magnetite Fe 3 O 4 , being anciently known magnetic material to human kind and remaining in leading positions for development of advanced technologies presently, demonstrates a number of puzzling physical phenomena, being at focus of extensive research for more than century. Recently the pressure-induced anomalous behavior of physical properties of magnetite in vicinity of the structural phase transition, occurring at P ~ 25–30 GPa, has attracted particular attention, and its nature remains unclear. Here we study the magnetic and electronic properties of magnetite across high pressure anomaly and in the pressure-induced phase by means of 57 Fe synchrotron Moessbauer spectroscopy and neutron diffraction. The hyperfine interaction parameters behavior was systematically analysed over pressure 0–40 GPa and temperature 10–290 K ranges. In the high pressure phase the ferrimagnetic order formation below T NP ~ 420 K was observed and spin arrangement symmetry was deduced. The structural, magnetic and electronic phase diagram of magnetite in the discussed pressure range is established.
ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-019-41184-3