Short range magnetic correlations induced by la substitution in Ho 1-xLaxMn2O5

Chin Wei Wang, Chun Ming Wu, Chi Yen Li, Sunil K. Karna, Chien Kang Hsu, Carissa H.C. Li, Wen Hsien Li, Chun Chen Yu, Chun Pin Wu, Hsiung Chou, Jeffrey W. Lynn

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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 HoMn2O5. 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 140K are greatly enhanced by 18% La substitution. The neutron magnetic diffraction patterns reveal the development of short range magnetic correlations below 140K. 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 38K. Magnetic frustration could be the main mechanism governing the present observations.

Original languageEnglish
Article number246002
JournalJournal of Physics Condensed Matter
Issue number24
StatePublished - 2010


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