Magnetic relaxation in La0.250Pr0.375Ca0.375MnO3 with varying phase separation

Abstract

We have studied the magnetic relaxation properties of the phase-separated manganite compound La0.250Pr0.375Ca0.375MnO3 . A series of polycrystalline samples was prepared with different sintering temperatures, resulting in a continuous variation of phase fraction between metallic (ferromagnetic) and charge-ordered phases at low temperatures. Measurements of the magnetic viscosity show a temperature and field dependence which can be correlated to the static properties. Common to all the samples, there appears to be two types of relaxation processes - at low fields associated with the reorientation of ferromagnetic domains and at higher fields associated with the transformation between ferromagnetic and non-ferromagnetic phases.

30 pages with figures, PDF, accepted to be published in Physical Review B

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• Study of Percolative Transitions with First-Order Characteristics in the Context of CMR Manganites
• Electronic phase separation in the rare earth manganates, (La1-xLnx)0.7Ca0.3MnO3 (Ln = Nd, Gd and Y)
• Magnetocaloric effect in manganites: metamagnetic transitions for magnetic refrigeration
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• Cluster glass magnetism in the phase-separated Nd2/3Ca1/3MnO3 perovskite
• Suppression of the Magnetic Phase Transition in Manganites Close to the Metal-Insulator Crossover
• Large Magnetoresistance and Jahn Teller effect in Sr${}_2$FeCoO${}_6$
• Grain size modification in the magnetocaloric and non-magnetocaloric transitions in La0.5Ca0.5MnO3 probed by direct and indirect methods
• Effect of suppression of local distortion on magnetic, electrical and thermal transport properties of Cr substituted bi-layer manganite LaSr${}_2$Mn${}_2$O${}_7$
• Equilibrium tuned by a magnetic field in phase separated manganite
• Investigation of the phase separation property in La${}_{0.2}$Pr${}_{0.4}$Ca${}_{0.4}$MnO${}_3$ manganite
• Thermal cycling effects on static and dynamic properties of a phase separated manganite
• Controlling thermal cycling effect in phase separated manganites with high temperature thermal treatments
• Thermal cycling memory in phase separated manganites