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arXiv · 0802.2729

Temperature memory and resistive glassy behaviors of a perovskite manganite

D. N. H. Nam·N. V. Khien·N. V. Dai·L. V. Hong·N. X. Phuc
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Abstract

This paper reports the observations of long-time relaxation, aging, and temperature memory behaviors of resistance and magnetization in the ferromagnetic state of a polycrystalline La0.7Ca0.3Mn0.925Ti0.075O3 compound. The observed glassy dynamics of the electrical transport appears to be magnetically originated and has a very close association with the magnetic glassiness of the sample. Phase separation and strong correlation between magnetic interactions and electronic conduction play the essential roles in producing such a resistive glassiness. We explain the observed effects in terms of a coexistence of two competing thermomagnetic processes, domain growth and magnetic freezing, and propose that hole-doped perovskite manganites can be considered as "resistive glasses".

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D. N. H. Nam, N. V. Khien, N. V. Dai, L. V. Hong, N. X. Phuc. 2008-02-19. Temperature memory and resistive glassy behaviors of a perovskite manganite. https://doi.org/10.1103/physrevb.77.214406

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