| Enhancement of ferromagnetic correlations on multiferroic TbMnO(3) by replacing Mn with Co. | |
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MedLine Citation:
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PMID: 23060595 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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The structural, electronic and magnetic properties of TbMn(1-x)Co(x)O(3) (0.1 ≤ x ≤ 0.9) compounds are reported. The samples are isostructural to TbMnO(3) adopting the orthorhombic distorted perovskite structure (Pbnm), except for x = 0.4, 0.5 and 0.6, where an ordered double perovskite structure (P2(1)/n) is found. X-ray absorption spectra at the Mn and Co K edges show an incomplete charge transfer between Mn and Co atoms yielding a mixed valence state Mn(3+)/Mn(4+) and Co(3+)/Co(2+) for the whole series. Neutron powder diffraction measurements show the development of a ferromagnetic ground state for the intermediate compositions (0.3 ≤ x ≤ 0.6) indicating that the ferromagnetic superexchange Mn(4+)-O-Co(2+) interaction is the strongest among a wide set of competitive interactions. The ferromagnetic ordering is, however, not fully achieved and coexists with glassy magnetic properties. With increasing concentration of Co (x ≥ 0.7) the long range ordering vanishes and only a glassy magnetic behavior with slow dynamics is found. These properties could be related to the existence of magnetically inhomogeneous small clusters arising from competitive magnetic interactions. |
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Authors:
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V Cuartero; J Blasco; J García; S Lafuerza; G Subías; J A Rodriguez-Velamazán; C Ritter |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2012-10-12 |
Journal Detail:
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Title: Journal of physics. Condensed matter : an Institute of Physics journal Volume: 24 ISSN: 1361-648X ISO Abbreviation: J Phys Condens Matter Publication Date: 2012 Oct |
Date Detail:
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Created Date: 2012-10-12 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101165248 Medline TA: J Phys Condens Matter Country: - |
Other Details:
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Languages: ENG Pagination: 455601 Citation Subset: - |
Affiliation:
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ALBA Synchrotron/CELLS, Cerdanyola del Vallès, E-08290, Spain. Instituto de Ciencia de Materiales de Aragón, Departamento de Física de la Materia Condensada, CSIC-Universidad de Zaragoza, Zaragoza, E-50009, Spain. |
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