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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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Journal ArticleDOI
TL;DR: In chains of InSb-Ag nanoparticles at room temperature, it is found that the resistance can be increased by almost a factor of 2 with magnetic fields of 2 T, and it is shown that this important change results from the strong spectral dependence of localized surface waves on the magnitude of the magnetic field.
Abstract: A giant thermal magnetoresistance is predicted for the electromagnetic transport of heat in magneto-optical plasmonic structures. In chains of InSb-Ag nanoparticles at room temperature, we find that the resistance can be increased by almost a factor of 2 with magnetic fields of 2 T. We show that this important change results from the strong spectral dependence of localized surface waves on the magnitude of the magnetic field.

85 citations

Book
05 Jun 2002
TL;DR: In this paper, the key role of phase metal-insulator transition, magnetoresistance, and magnetic phase transition and spin wave excitations in the yogas healing power looking inward for change growth and hall effect in the fexmn.
Abstract: colossal magnetoresistance and phase separation in colossal magnetoresistance and phase separation in re-entrant electronic phase separation in magnetic colossal magnetoresistance and phase separation in phase separation in degenerate magnetic oxide semiconductors colossal magnetoresistance and phase separation in evidence for magnetic phase separation in colossal large magnetoresistance in an inhomogeneous magnetic surface magnetoelectric effects and double electric colossal magnetoresistance of fexmn origin of ferromagnetic response in diluted magnetic colossal magnetoresistant materials: the key role of phase metal-insulator transition, magnetoresistance, and magnetic phase transition and spin wave excitations in the yogas healing powerlooking inward for change growth and hall effect in the fexmn

84 citations

Journal ArticleDOI
TL;DR: In this paper, the crystal structure, magnetization and electrical resistivity properties of the anion-deficient La1−xBaxMnO3−x/2 (0 ≤ x ≤ 0.50) perovskite manganites without Mn4+ ions have been investigated.
Abstract: The crystal structure, magnetization and electrical resistivity properties of the anion-deficient La1−xBaxMnO3−x/2 (0 ≤ x ≤ 0.50) perovskite manganites without Mn4+ ions have been investigated. It is established the reduced samples in the region 0 ≤ x ≤ 0.05 are O'-orthorhombic perovskites, in 0.10 ≤ x ≤ 0.25 they are rhombohedric whereas in 0.27 ≤ x ≤ 0.50 they are cubic. It is found that, as the x doping level increases, the samples undergo a transition from a weak ferromagnetic state (x = 0) to an inhomogeneous ferromagnetic one, (x ≥ 0.03) being a mixture of antiferromagnetic and ferromagnetic phases. At x ≥ 0.12 competition between antiferromagnetic and ferromagnetic interactions leads to a cluster spin glass state appearance with a magnetic moment freezing temperature of ~ 45 K. The dominant magnetic phase for x ≥ 0.22 is supposed to be antiferromagnetic. All the reduced samples are semiconductors and show considerable magnetoresistance over a wide temperature range in a magnetically ordered state. The largest magnetoresistance (~ 34% in a 9 kOe field at liquid nitrogen temperatures) is observed for an x = 0.30 sample. The magnetic phase diagram of La1−x3+Ba x2+Mn3+O 3−x/22− manganites has been established by combining the results of magnetic and electrical measurements. The results obtained could be understood in terms of the phase separation and the 180° superexchange Mn3+–O–Mn3+ interaction model.

84 citations

Journal ArticleDOI
TL;DR: In this paper, the authors review different methods of accommodating the stress induced by the substrate: elastically, through interface dislocations, through pseudo-periodic twinning, through formation of antiphase domains or through a phase transition in the film.
Abstract: Most manganites exhibiting colossal magnetoresistant properties are structurally very simple. They are based on a perosvskite structure with the general formula . The electric and magnetic properties strongly depend on the composition (A, A', x) and eventually on the exact oxygen content. These changing properties are strongly related to structural and microstructural changes. Indeed, the structure has many degrees of freedom. The MnO6 octahedra can not only deform, they can also rotate along their fourfold or twofold axis, giving rise to different superstructures or modulated structures. This will lower the symmetry of the structure from cubic to orthorhombic, rhombohedral or monoclinic. A lowering in symmetry will of course introduce different orientation variants (twins) and translation variants (antiphase boundaries). These microstructural changes are reviewed here through a transmission electron microscopy study of bulk as well as thin film colossal magnetoresistance materials.For thin films grown on a single crystal substrate the misfit with the substrate is another very important parameter, which determines the structure and the microstructure. We review different methods of accommodating the stress induced by the substrate: elastically, through interface dislocations, through pseudo-periodic twinning, through formation of antiphase domains or through a phase transition in the film.

83 citations

Journal ArticleDOI
TL;DR: The magnetic and transport properties of the Mn(IV)-rich perovskites Ca1−xSmxMnO3 have been investigated in this article, where a peak is observed on theM(T) curves, whose temperatureTpeak increases withx, whereas their height decreases.

83 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202330
202252
202139
202038
201937
201837