Conductivity behavior of La_0.75Ca_0.25MnO₃ in vicinity of ferromagnetic-paramagnetic transition studied with single current pulses

2008/04/17 by V. B. Krasovitsky, Krasovitsky, V. B., Б. И. Белевцев +1
Earth and Planetary Sciences · Materials Science · Physics and Astronomy · #FOS: Physical sciences #High-pressure geophysics and materials #Magnetic and transport properties of perovskites and related materials #Materials Science (cond-mat.mtrl-sci) #Rare-earth and actinide compounds #Strongly Correlated Electrons (cond-mat.str-el)

paper · pdf · doi:10.48550/arxiv.0804.2806

openalex publication_date 2008/04/17 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

Temperature and current dependences of resistivity of bulk La_0.75Ca_0.25MnO₃ sample grown by the floating-zone method were studied using single ramp pulses of current. It is found that near the Curie temperature T_C the sample resistance depends substantially on current magnitude. The observed features can be determined by inhomogeneous Joule overheating due to mixed phase state of manganites near the ferromagnetic-paramagnetic transition and percolation character of this transition.

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