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Showing 1 to 13 of 13 for “"Colossal magnetoresistance"”.
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Mesoscopic noise probe of an inhomogeneous colossal magnetoresistance phase
… fluctuations in the region of phase space where colossal magnetoresistance effects are strongest. The fluctuators' dependence on magnetic field indicates that the resistance steps represent small regions of material fluctuating between a paramagnetic insulating phase and a ferromagnetic …
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Study of colossal magnetoresistance and pressure effects in La2/3Ca1/3MnO2 thin films /
… and magnetic properties. Thin films show colossal negative magnetoresistance (CMR) near transition from an insulating to a metallic state accompanied closely by transition from a paramagnetic to a ferromagnetic state. The double exchange mechanism (DE) and the Jahn-Teller deformations play …
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Probing spin, charge and lattice coupling in manganites
… on applying pressure to probe the properties of Colossal Magnetoresistance Manganites, self-doped La_xMnO_3 (X=0.85, 0.75) and chemically doped La_{0.67}Ca_{0.33}MnO_3. For all of them, obvious pressure effects on electronic transport and structure have been investigated; especially, critical …
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Structural and magnetic properties of Ni and Cr substituted La₀.₇Sr₀.₃MnO₃
… are of significant interest due to their large magnetoresistance, and electronic transport properties that change significantly, depending on values of x and which transition metal used. Their applications in technology include cathodes for solid oxide fuel cells, resistance random access memory …
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A study of three transition metal compounds and their applications
The La_{5/8-y}Pr_yCa_{3/8}MnO_3 with colossal magnetoresistance (CMR) effect has a rich phase diagram and is well studied for its electronic phase separation phenomenon, where the ferromagnetic (FM) metal order co-exists and competes with the charge-ordered (CO) insulator phase. High Pr doping will …
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Neutron Scattering Studies of Unusual Spin Structure and Local Correlation in Complex Oxides
… by the richness of their novel properties (e.g. Colossal Magnetoresistance (CMR), Quantum Criticality, and High Temperature Superconductivity), the complexity of the underlying physics, and the promise of technological applications. In this work, elastic and inelastic neutron scattering is used …
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Microscopic Study of Structure, Chemical Composition and Local Conductivity of La2/3Sr1/3MnO3 Films
The colossal magnetoresistance (CMR) manganites have attracted intensive study due to their richness of underlying physics and potential technological applications. Of particular interest is half-metallic La2/3Sr1/3MnO3 (LSMO) because it possesses the highest known Curie temperature of the group ~ …
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Inelastic light scattering studies of quantum phase transitions in CuxTiSe2 and multiferroic TbMnO3
… and exhibit interesting phenomena such as colossal magnetoresistance (CMR), high temperature superconductivity and charge/orbital ordering (COO). Magnetoelectric multiferroics are an important and interesting sub-class of strongly correlated systems. These are systems whose magnetic and …
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Templated self-assembly of multiferroic nanocomposites
… physical phenomena such as superconductivity, colossal magnetoresistance and multiferroicity. New functionalities are especially found at interfaces between two oxides, including emergent electronic states like two-dimensional electron gases, enhanced ionic transport and magnetoelectric …
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Jahn-Teller distortions in layered nickel oxides
… high-temperature cuprate superconductivity, and colossal magnetoresistance. This work advances both the methodology for parameterising Jahn-Teller-distorted octahedra in crystal structures, via calculation of the Van Vleck modes, and sheds new insight onto the Jahn-Teller distortion in layered …
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Ladungs- und Orbitalordnungsphänomene in Übergangsmetalloxidverbindungen unter hydrostatischem Druck
… shows a strong magnetoresistive effect, called colossal magnetoresistance (CMR). In this system, several ordered phases can be found, which exhibit charge, spin and - since the orbital degree of freedom is also present in the manganites - additionally orbital ordering phenomena. In particular, …
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Nanostruktūrizuotų manganitų kobaltitų sluoksnių magnetovaržinės savybės /
In this doctoral dissertation the magnetoresistance properties of manganite films La1 xSrxMnzO3 doped with cobalt (La1−xSrx(Mn1−yCoy)zO3) were investigated. The resistivity vs. temperature dependences and metal semiconductor transition temperature dependence on the degree of cobalt doping and the …
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Low Temperature Single-Crystal X-ray Diffraction on A(1-x)A'xMnO3 (A=La,Eu and A'=Ba,Sr)
… interest toward these compounds manifested when colossal magnetoresistance (CMR) was discovered in manganites. We have selected three particular compositions in order to study three different aspects of their structures, that are: the analysis of the structural behavior (and its correlation to …