Short range magnetic correlations induced by La substitution in Ho(1-x)La(x)Mn(2)O(5)

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 t...

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Published inJournal of physics. Condensed matter Vol. 22; no. 24; p. 246002
Main Authors Wang, Chin-Wei, Wu, Chun-Ming, Li, Chi-Yen, Karna, Sunil K, Hsu, Chien-Kang, Li, Carissa H C, Li, Wen-Hsien, Yu, Chun-Chen, Wu, Chun-Pin, Chou, Hsiung, Lynn, Jeffrey W
Format Journal Article
LanguageEnglish
Published England 23.06.2010
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Summary: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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ISSN:1361-648X
DOI:10.1088/0953-8984/22/24/246002