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Paramagnetic phase observed by electron spin resonance in the phase separated Pr<inf>0.65</inf>Ca<inf>0.25</inf>Sr<inf>0.10</inf>MnO<inf>3</inf> manganite below the order temperature

Abstract:

We present electron spin resonance (ESR) data at 9.4 GHz in the phase separated Pr0.65Ca0.25Sr0.10MnO3 manganite. The coexistence of two resonance lines are observed below the short-range magnetic-order temperature (Ts≈255K). One of the ESR line is a paramagnetic contribution retained from the high-temperature phase. The second contribution appears at Ts, which is associated with the presence of ferromagnetic regions. The two contributions can be seen near the charge-order transition, 7co≈210K. We study the temperature evolution of the resonance field and the linewidth of the ESR lines. © 2003 Elsevier B.V. All rights reserved.