Results 201 to 210 of about 97,118 (241)
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Colossal Magnetoresistive Oxides
20001. Fundamental Features of CMR Manganites 2. Spin Dynamics and Electronic Structures 3. Materials Systematics and Lattice Effects 4. Tunnelling Magnetoresistance.
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Colossal Magnetoresistive Manganites
2004This book is a comprehensive account of the present understanding of an important class of perovskite oxide materials with potential industrial applications. The chapters are written by well-known scientists who are on the forefront of the field and have directly contributed to its recent progress.
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POLARON ORDERING IN FERROMAGNETIC COLOSSAL MAGNETORESISTIVE OXIDES
International Journal of Modern Physics B, 2000We review our recent x-ray and neutron scattering studies that reveal static diffuse scattering due to polarons in the paramagnetic phase of the colossal magnetoresistive manganites La 2-2x Sr 1+2x Mn 2 O 7, with x=0.40 and 0.44. We show that the polarons exhibit short-range incommensurate correlations that grow with decreasing temperature, but ...
Vasiliu-Doloc, L. +8 more
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The overdoped colossal magnetoresistive manganites
Journal of Physics: Condensed Matter, 2007The rich physics in the overdoped regime in colossal magnetoresistive manganites is discussed in detail. Apart from having a large magnetoresistance like its underdoped counterpart, the overdoped regime offers a rich variety of phenomena including magnetic, charge and orbital order at low temperatures.
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DYNAMICS AND LOCAL STRUCTURE OF COLOSSAL MAGNETORESISTANCE MANGANITES
International Journal of Modern Physics B, 2000We report Extended X-ray Absorption Fine Structure and anelastic spectroscopy measurements on hole doped manganese oxides La 1-x Ca x MnO 3 which present the colossal magnetoresistance effect. EXAFS measurements were realized both in the absence and presence of an applied magnetic field of 1.1 Tesla, in a wide temperature range (between 330 and 77 K ...
C. Castellano +6 more
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Ultrafast Conductivity Dynamics in Colossal Magnetoresistance Manganites
Physical Review Letters, 2001Ultrafast picosecond measurements of optically induced changes in the absolute conductivity (0.4-1.0 THz) of La0.7M0.3MnO3 thin films ( M = Ca, Sr) from 10 K to approximately 0.9 Tc reveal a two-component relaxation. A fast, approximately 2 ps, conductivity decrease arises from an optically induced modification of the effective phonon temperature.
R D, Averitt +5 more
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Novel colossal magnetoresistance in NaCr2O4
Journal of the Korean Physical Society, 2013NaCr2O4 was recently discovered using a high-pressure synthesis to occur in a calcium-ferrite-type structure, where one-dimensional electronic correlations and geometrical frustrations can coexist. It shows unconventional colossal magnetoresistance (CMR) at temperatures below antiferromagnetic ordering temperature of T
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Theory of colossal magnetoresistance in manganites
Journal of Physics: Condensed Matter, 1999The recent attempt to account for the existence of several magnetic phases in insulating perovskite manganites in terms of the interplay between the orbital and spin orders produced by the localized eg and t2g electrons is extended to the metallic state which is obtained on doping.
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Colossal angular magnetoresistance in ferrimagnetic nodal-line semiconductors
Nature, 2021Junho Seo +15 more
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Ferromagnetism and Colossal Magnetoresistance from Phase Competition
Physical Review Letters, 2000We report a multicomponent theory for the coexistence of charge ordering (CO), and antiferromagnetic (AFM) and ferromagnetic (FM) spin ordering. This kind of state is invoked for manganites by Moreo et al., Science 283, 2034 (1999) and observed in recent experiments. We show that doping an AFM or CO state always generates a FM component.
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