Elastic, magnetic, and magnetoelectric properties of the CaBaCo{sub 4}O{sub 7} multiferroic

Journal Article · Thu Dec 15 04:00:00 EST 2016 · Journal of Experimental and Theoretical Physics

DOI:https://doi.org/10.1134/S106377611611011X· OSTI ID:22617110

Snegirev, V. V.; Vorob’ev, G. P.; Popov, Yu. F.; Vyalykh, D. K. ^[1]; Kozeeva, L. P.; Kameneva, M. Yu. ^[2]

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1. Moscow State University (Russian Federation)
2. Russian Academy of Sciences, Nikolaev Institute of Inorganic Chemistry, Siberian Branch (Russian Federation)

The structural, elastic, magnetic, and magnetoelectric properties of the CaBaCo{sub 4}O{sub 7} multiferroic are experimentally studied and compared with the properties of the related YBaCo{sub 4}O{sub 7} cobaltite, where Y{sup 3+} ions substitute for Ca{sup 2+} ions. Unlike the frustrated YBaCo{sub 4}O{sub 7} magnet, the softening of Young’s modulus and the hysteresis in the ΔE(T)/E{sub 0} curve of ferrimagnetic CaBaCo{sub 4}O{sub 7} in the paramagnetic region are weak, and the anomaly during the magnetic transition increases by almost an order of magnitude. This difference can point to different characters of the development of a long-range magnetic order in these two cobaltites. The distortion of the crystal structure that removes the frustrations of exchange interactions is found to correlate with the magnetic behavior of the cobaltites under study. The magnetization curves of the Ca cobaltite have two steps below 15 K, which can point to the presence of a metastable state in a high magnetic field. The study of the longitudinal and transverse magnetoelectric effects in a pulsed magnetic field demonstrates that their magnitudes are maximal near T{sub C} and change their character from linear to quadratic during passage through this temperature.

• OSTI ID: 22617110
• Journal Information: Journal of Experimental and Theoretical Physics, Journal Name: Journal of Experimental and Theoretical Physics Journal Issue: 6 Vol. 123; ISSN JTPHES; ISSN 1063-7761
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BARIUM COMPOUNDS
CALCIUM COMPOUNDS
COBALT COMPOUNDS
COMPARATIVE EVALUATIONS
CRYSTAL STRUCTURE
ELASTICITY
ELECTRICAL PROPERTIES
EXCHANGE INTERACTIONS
HYSTERESIS
MAGNETIC FIELDS
MAGNETIC PROPERTIES
MAGNETIZATION
MAGNETS
METASTABLE STATES
OXYGEN COMPOUNDS
PARAMAGNETISM
YTTRIUM COMPOUNDS