Near-Room-Temperature Colossal Magnetodielectricity and Multiglass Properties in Partially Disordered La2NiMnO6
2012 (English)In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 108, no 12, 127201- p.Article in journal (Refereed) Published
We report magnetic, dielectric, and magnetodielectric responses of the pure monoclinic bulk phase of partially disordered La2NiMnO6, exhibiting a spectrum of unusual properties and establish that this compound is an intrinsically multiglass system with a large magnetodielectric coupling (8%-20%) over a wide range of temperatures (150-300 K). Specifically, our results establish a unique way to obtain colossal magnetodielectricity, independent of any striction effects, by engineering the asymmetric hopping contribution to the dielectric constant via the tuning of the relative-spin orientations between neighboring magnetic ions in a transition-metal oxide system. We discuss the role of antisite (Ni-Mn) disorder in emergence of these unusual properties.
Place, publisher, year, edition, pages
2012. Vol. 108, no 12, 127201- p.
Condensed Matter Physics Engineering and Technology
Research subject Physics with spec. in Atomic, Molecular and Condensed Matter Physics; Engineering Science with specialization in Solid State Physics
IdentifiersURN: urn:nbn:se:uu:diva-190909DOI: 10.1103/PhysRevLett.108.127201ISI: 000301641600017OAI: oai:DiVA.org:uu-190909DiVA: diva2:584433