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Published on: April 12, 2019
Short range magnetic correlations induced by La substitution in Ho(1-x)La(x)Mn(2)O(5)
Chin-Wei Wang1, Chun-Ming Wu, Chi-Yen Li
1Department of Physics and Center for Neutron Beam Applications, National Central University, Jhongli, 32001, Taiwan.
Abstract:
Magnetic susceptibility, x-ray diffraction, neutron diffraction and Raman scattering measurements are employed to study the effects of La substitution on the magnetic properties of multiferroic HoMn(2)O(5). 9% and 18% La-substituted compounds crystallize into the same orthorhombic Pbam symmetry as the parent compound. The magnetic responses to an ac driving magnetic field between 40 and 140 K are greatly enhanced by 18% La substitution. The neutron magnetic diffraction patterns reveal the development of short range magnetic correlations below 140 K. In addition, two Raman peaks and a series of new x-ray diffraction peaks suddenly develop below this temperature. Incommensurate long range antiferromagnetic order appears below 38 K. Magnetic frustration could be the main mechanism governing the present observations.
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