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Magnetoelectric effect in samarium molybdate |
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| Authors: | B K Ponomarev B S Red’kin E Stiep H Wiegelmann A G M Jansen P Wyder |
| Institution: | (1) Institute of Solid State Physics, Russian Academy of Sciences, Chernogolovka, Moscow oblast, 142432, Russia;(2) Grenoble High Magnetic Field Laboratory, B.P. 166, Grenoble Cedex 9, F-38042, France |
| Abstract: | This paper reports on the nonlinear magnetoelectric effect (MEE) in the orthorhombic ferroelectric ferroelastic β′ phase of samarium molybdate Sm2(MoO4)3 observed in magnetic fields up to 20 T and temperatures from 4.4 to 0.43 K. The magnetic-field-induced electric polarization in Sm2(MoO4)3 is an order of magnitude larger than that in isomorphic Gd2(MoO4)3. This provides support for the magnetostriction mechanism proposed by us for the MEE in rare-earth molybdates. The polarization in Sm2(MoO4)3 was found to fall off with time. The relaxation time constant τ increases with decreasing temperature from τ=102 s at T=4.4 K to τ≈103 s at T=0.43 K. |
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