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, structural, electrical and magnetic properties of Cd-doped La0.7 (Ca0.3−xCdx)MnO3 (0⩽x ⩽ 0.3) manganites are presented.
31 citations
TL;DR: In this article, the antiferromagnetic transitions in Pr0.67Ca0.33MnO3 have been studied by resistivity, thermopower, magnetic susceptibility and capacitance measurements.
31 citations
TL;DR: In this paper, the electrical and magnetoresistant properties of La 0.67 (Ca 0.65 Ba 0.35 ) 0.33 MnO 3 /Ag x (abbreviated by LCBMO/Ag x ) have been studied.
31 citations
TL;DR: In this article, a detailed review of optical studies on colossal magnetoresistance (CMR) manganites with perovskite or related structures is given, and a remarkable spectral weight transfer is observed in a layered manganite.
Abstract: Review is given on late optical studies on colossal magnetoresistance (CMR) manganites with perovskite or related structures. In La1−x
Sr
x
MnO3 which undergoes a ferromagnetic transition, optical conductivity spectrum σ(ω) shows a change from a gap-like feature to metallic but highly diffussive one with increasing spin-polarization. Such a remarkable spectral weight transfer is also observed in a layered manganite, La2−2x
Sr1+2x
Mn2O7 (x = 0.4), with a mid-infrared peak structure due to inter-orbital
$$(d_{x^2 - y^2 } \to d_{3z^2 - r^2 } )$$
transition. In Pr1−x
Ca
x
MnO3 (x = 0.4) which undergoes the charge ordering phase transition, σ(ω) shows an anisotropic feature reflecting charge/orbital ordering pattern at 10 K. The charge-ordered state is transformed into a ferromagnetic metallic state by a magnetic field of 6.5 T at 30 K, which is manifested in a huge change of optical spectra over a wide photon-energy region (0.05 eV–3 eV).
31 citations
TL;DR: This material demonstrates an unusual CMReffect that is closely related to its unconventional magnetic structure caused by spin frustration and is found in a chromium oxide, not in a manganese oxide, having an insulating groundstate.
Abstract: ions. This material demonstrates an unusual CMReffect that is closely related to its unconventional magneticstructure caused by spin frustration. The CMR of thiscompound is unique from several aspects. First, it is observedin a chromium oxide, not in a manganese oxide. Second, it isfound in a single-phase material having an insulating groundstate. Third, the CMR is not limited to the vicinity of themagnetic phase transition but becomes progressively moreprominent with decreasing temperature down to 0 K. Thediscovery of the NaCr
31 citations