Topic
Colossal magnetoresistance
About: Colossal magnetoresistance is a research topic. Over the lifetime, 3658 publications have been published within this topic receiving 130104 citations.
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TL;DR: In this paper, the authors studied the charge/orbital ordering in perovskite manganites and showed that as the effective one-electron bandwidth decreases, the colossal magnetoresistance (CMR) or charge/orbital ordering appears.
52 citations
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TL;DR: Yb14MnSb11 is a member of a remarkable structural family of compounds that are classified according to the concept of Zintl as mentioned in this paper, which provides a flexible framework for tuning structure-property relationships and hence the physical and chemical properties of compounds.
52 citations
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TL;DR: In this paper, two types of conditions were chosen, with the aim of taking oxygen from the grain boundaries and removing oxygen uniformly from the sample, and the results showed that reducing conditions increase the overall resistivity and suppress theCurie Weisstperature( T #).
52 citations
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TL;DR: In this article, the spin double exchange and lattice polaron were combined to study the magnetoresistance properties of perovskite manganites, and the effects of the double exchange interaction on the lattice degree of freedom were explored.
Abstract: Based on the model combining the spin double exchange and the lattice polaron, we have studied the colossal-magnetoresistance phenomena observed in perovskite manganites ${\mathrm{R}}_{1\mathrm{\ensuremath{-}}\mathrm{x}}$${\mathrm{A}}_{\mathrm{x}}$${\mathrm{MnO}}_{3}$. First, effects of both the double exchange and the electron-phonon interaction on the transport properties are investigated. We have evaluated the temperature-dependent resistance and the magnetoresistance using the Kubo formula, and examined the crossover from the tunneling to hopping regime of small polarons. Second, effects of the double-exchange interaction on the lattice degree of freedom are explored. It is found that both the hardening of the phonon frequency and a reduction of the phonon damping take place with decreasing the temperature.
52 citations
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TL;DR: In this paper, the magnetoresistance of La2/3Ca1/3MnO3+δ magnetic thin films was investigated and a remarkable hysteresis and a relaxation behavior of the resistance was observed.
Abstract: We investigated the magnetoresistance of La2/3Ca1/3MnO3+δ magnetic thin films. Under certain conditions, the magnetoresistance curves show a remarkable hysteresis and the resistance becomes dependent on the magnetic history. A relaxation behavior of the resistance has also been observed. Hysteresis and relaxation of the resistance are very similar to the phenomena of magnetoviscosity of the magnetic moment in spin glasses and the magnetic aftereffect in hard magnets.
52 citations