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Surface phase separation in nanosized charge-ordered manganites
Nanjing University, MA 02460 USA.
Linköping University, Department of Physics, Chemistry and Biology, Biomolecular and Organic Electronics. Linköping University, The Institute of Technology.ORCID iD: 0000-0002-2582-1740
Nanjing University, MA 02460 USA.
Nanjing University, MA 02460 USA.
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2007 (English)In: Applied Physics Letters, ISSN 0003-6951, E-ISSN 1077-3118, Vol. 90, no 8, 082508- p.Article in journal (Refereed) Published
Abstract [en]

Recent experiments showed that the robust charge ordering in manganites can be weakened by reducing the grain size down to nanoscale. Weak ferromagnetism was evidenced in both nanoparticles and nanowires of charge-ordered manganites. To explain these observations, a phenomenological model based on surface phase separation is proposed. The relaxation of superexchange interaction on the surface layer allows formation of a ferromagnetic shell, whose thickness increases with decreasing grain size. Possible exchange bias and softening of the ferromagnetic transition in nanosized charge-ordered manganites are predicted. (c) 2007 American Institute of Physics.

Place, publisher, year, edition, pages
American Institute of Physics (AIP) , 2007. Vol. 90, no 8, 082508- p.
National Category
Physical Sciences
URN: urn:nbn:se:liu:diva-115715DOI: 10.1063/1.2709911ISI: 000244420600055OAI: diva2:796079
Available from: 2015-03-18 Created: 2015-03-18 Last updated: 2015-03-30

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