Magnetic anisotropy and magnetoelectric properties of Tb{sub 1-x}Er{sub x}Fe{sub 3}(BO{sub 3}){sub 4} ferroborates

Journal Article · Wed Jul 15 00:00:00 EDT 2009 · Journal of Experimental and Theoretical Physics

DOI:https://doi.org/10.1134/S1063776109070097· OSTI ID:21443705

Zvezdin, A K ^[1]; Popov, Yu F; Vorob'ev, G P; Pyatakov, A P ^[2]; Ivanov, V Yu; Kuz'menko, A M; Mukhin, A A ^[1]; Bezmaternykh, L N; Gudim, I A ^[3]

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1. Russian Academy of Sciences, Prokhorov Institute of General Physics (Russian Federation)
2. Moscow State University (Russian Federation)
3. Russian Academy of Sciences, Kirenskii Institute of Physics, Siberian Division (Russian Federation)

Magnetic and magnetoelectric properties of ferroborate single crystals with complex composition (Tb{sub 1-x}Er{sub x}Fe{sub 3}(BO{sub 3}){sub 4}, x = 0, 0.75) and with competing exchange Tb-Fe and Er-Fe interactions are investigated. Jumps in electric polarization, magnetostriction, and magnetization are observed as a result of spin-flop transitions, as well as a considerable decrease in the critical field upon an increase in the Er concentration, in a field H{sub c} parallel to the c axis. The observed behavior of phase-transition fields is analyzed and explained using a simple model taking into account anisotropy in g factors and exchange splitting of funda-mental doublets of the easy-axis Tb{sup 3+} ion and easy-plane Er{sup 3+} ion. It is established that magnetoelectric and magnetostriction anomalies under spin-flop transitions are mainly controlled by the Tb subsystem. The Tb subsystem makes a nonmonotonic contribution {Delta}P{sub a}(H{sub a}, T) to polarization along the a axis: the value of {Delta}P{sub a} reverses its sign and increases with temperature due to the contribution from the excited states of the Tb{sup 3+} ion.

• OSTI ID: 21443705
• Journal Information: Journal of Experimental and Theoretical Physics, Vol. 109, Issue 1; Other Information: DOI: 10.1134/S1063776109070097; Copyright (c) 2009 Pleiades Publishing, Ltd.; ISSN 1063-7761
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANISOTROPY
BORATES
CONCENTRATION RATIO
CRITICAL FIELD
ERBIUM COMPOUNDS
ERBIUM IONS
EXCITED STATES
IRON COMPOUNDS
LANDE FACTOR
MAGNETIZATION
MAGNETOSTRICTION
MONOCRYSTALS
PHASE TRANSFORMATIONS
POLARIZABILITY
POLARIZATION
SPIN
TEMPERATURE DEPENDENCE
TERBIUM COMPOUNDS
TERBIUM IONS
ANGULAR MOMENTUM
BORON COMPOUNDS
CHARGED PARTICLES
CRYSTALS
DIMENSIONLESS NUMBERS
ELECTRICAL PROPERTIES
ENERGY LEVELS
IONS
MAGNETIC FIELDS
MAGNETIC PROPERTIES
OXYGEN COMPOUNDS
PARTICLE PROPERTIES
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
TRANSITION ELEMENT COMPOUNDS