Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.jmmm.2010.04.021
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dc.titleDetection of structural and magnetic transitions in la 0.67Ba0.23Ca0.1MnO3 using the rf resonance technique
dc.contributor.authorNaik, V.B.
dc.contributor.authorLam, M.C.
dc.contributor.authorMahendiran, R.
dc.date.accessioned2014-10-16T09:20:35Z
dc.date.available2014-10-16T09:20:35Z
dc.date.issued2010-09
dc.identifier.citationNaik, V.B., Lam, M.C., Mahendiran, R. (2010-09). Detection of structural and magnetic transitions in la 0.67Ba0.23Ca0.1MnO3 using the rf resonance technique. Journal of Magnetism and Magnetic Materials 322 (18) : 2754-2757. ScholarBank@NUS Repository. https://doi.org/10.1016/j.jmmm.2010.04.021
dc.identifier.issn03048853
dc.identifier.urihttp://scholarbank.nus.edu.sg/handle/10635/96190
dc.description.abstractWe report radio-frequency (rf) electrodynamics in polycrystalline La 0.67Ba0.23Ca0.1MnO3 as a function of temperature and magnetic field using a home-built LC resonant circuit powered by an integrated chip oscillator. The resonance frequency (fr) of the oscillator and the power (P) absorbed by the sample are measured simultaneously. The paramagnetic to ferromagnetic phase transition in the absence of an external magnetic field is accompanied by a rapid decrease in both P and fr around the Curie temperature Tc=300K. However, much below Tc, the fr shows a step-like anomaly around 165 K (195 K) while cooling (warming), which we attribute to a structural phase transition from high temperature rhombohedral (R3̄c) to low temperature orthorhombic (Imma) phase. The step-like anomaly in fr- versus T disappears in a field of 300 G. Fractional changes as large as 19% in Δf r/fr, and 10% in ΔP/P are observed under H=1 kG around Tc. Our study suggests that the rf resonance technique is a versatile tool to study the magnetization dynamics as well as to investigate the structural phase transition in manganites. © 2010 Elsevier B.V. All rights reserved.
dc.description.urihttp://libproxy1.nus.edu.sg/login?url=http://dx.doi.org/10.1016/j.jmmm.2010.04.021
dc.sourceScopus
dc.subjectDynamical magnetization
dc.subjectManganite
dc.subjectRf absorption
dc.subjectStructural transition
dc.typeArticle
dc.contributor.departmentPHYSICS
dc.description.doi10.1016/j.jmmm.2010.04.021
dc.description.sourcetitleJournal of Magnetism and Magnetic Materials
dc.description.volume322
dc.description.issue18
dc.description.page2754-2757
dc.description.codenJMMMD
dc.identifier.isiut000278305600024
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