Colossal magnetostriction effect in HoMn2O5 |
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| Authors: | I. Radulov V. I. Nizhankovskii V. Lovchinov D. Dimitrov A. Apostolov |
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| Affiliation: | (1) Bulgarian Academy of Sciences, Institute of Solid State Physics, 72 “Tzarigradsko Chaussee" Blvd., 1784 Sofia, Bulgaria;(2) International Laboratory of High Magnetic Fields and Low Temperatures, 95 Gajowicka Str., 53421 Wroclaw, Poland;(3) Sofia University “St. Kl. Ohridski", Faculty of Physics, 5 “James Bourchier" Blvd., 1164 Sofia, Bulgaria |
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| Abstract: | We have investigated the detailed field and temperature dependence of the dielectric constant, electric polarization, magnetization and magnetostriction in orthorhombic HoMn2O5 single crystals. HoMn2O5 displays incommensurate antiferromagnetic ordering below 39 K, becoming commensurate on further cooling. The commensurate-incommensurate transition takes place at low temperatures. The inherent magnetic frustration in this material is lifted by a small lattice distortion, primarily involving shifts of the Mn3+ cations and giving rise to a canted antiferroelectric phase. Colossal magnetostriction effect was observed and a novel phase transition diagram was build. |
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| Keywords: | 75.47.Lx Manganites 75.80.+q Magnetomechanical and magnetoelectric effects, magnetostriction |
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