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ESR phase competition study of Pr0.5(Ca0.85Sr0.15)0.5MnO3

✍ Scribed by E. Winkler; M.T. Causa; C.A. Ramos; E. De Biasi

Publisher: Elsevier Science
Year: 2004
Tongue: English
Weight: 256 KB
Volume: 354
Category: Article
ISSN: 0921-4526
DOI: 10.1016/j.physb.2004.09.019

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✦ Synopsis

We report an electron spin resonance (ESR) study of the competing phases at the crossover from localized to itinerant behaviour on the polycrystalline Pr 0.5 (Ca 0.85 Sr 0.15 ) 0.5 MnO 3 compounds. From the temperature dependence of the ESR intensity, we derived the transition temperatures to charge order (T CO =230 K), and antiferromagnetic (T N =150 K) states. In addition, at To200 K, a ferromagnetic minority phase was found, that coexists with the paramagnetic and antiferromagnetic phases. We perform simulations of the ESR spectra that reproduce the behaviour found at different temperatures.

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