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Showing 1 to 20 of 46 for “"Manganite"”.
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Control of Superconductivity in Cuprate/Manganite Heterostructures
… In this project, devices incorporating cuprate/manganite heterostuctres were successfully fabricated to study the effects of spin transport on the high temperature superconductor, YBCO. Deposition of such oxide ferromagnet/superconductor(F/S) multilayers using the ‘eclipse’ pulsed laser …
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Critical behavior and transport properties of lanthanum manganite
… well before the entire system orders. The manganites' magnetic heat capacity peak has been observed to shift upward in temperature with applied magnetic field unlike that of ordinary ferromagnets. In the double exchange picture proposed by Zener, magnetism is closely linked to the nature of …
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Magneto-transport properties of manganite/secondary phase inhomogeneous systems
… granularity effect on related properties in manganites, by introducing secondary phases into a ferromagnetic manganite forming an inhomogeneous manganite/secondary phase system. TiO2 insulator was introduced as a secondary phase into the ferromagnetic La0.7Ba0.3MnO3 (LBMO) manganite with …
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Resistance Fluctuations and Phase Coexistence in Colossal Magneto-Resistive Manganite Thin Films
Submitted by Meng Tao (mengtao2@illinois.edu) on 2012-10-26T21:48:20Z No. of bitstreams: 1 Palanisami_Akilan.pdf: 8022291 bytes, checksum: 6eef3d3bdf57a3901e25f2a431750bf6 (MD5)
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Dispersion behavior of aluminum oxide, lanthanum manganite and lanthanum chromite powders in liquids
… the second is on the dispersion of lanthanum manganite and lanthanum chromite powders in nonaqueous solvents"--Abstract, page iii.</p>
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The Development of Alkoxy-Based Sol -Gel Processing for Magnetoresistive Manganite Thin Films
The cubic lattice parameters of the films (i.e., a = ∼ 3.90 A) were in excellent agreement with values published in the literature for bulk, polycrystalline powders. Typical grain sizes started at 10--15 nm, increasing to 20--25 nm by 750°C. For films deposited on Si(100), magnetoresistance …
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The development of alkoxy-based sol-gel processing for magnetoresistive manganite thin films
… thin films of magnetoresistive doped-lanthanide manganites onto silicon-based substrates. Crystallization of the requisite perovskite phase at temperatures below 650°C resulted from the incorporation of all-alkoxide precursors, and in particular, Mn[OC(CH 3 ) 3 )] 2 . This latter precursor, when …
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Comparison of the Reactivity of Various Mn-Oxides With CrIIIaq: Microscopic and Spectroscopic Observations of Dissolution, Cr-sorption and Cr and Mn Redox Interactions
… Occurring at the Cr<sup>III</sup><sub>aq</sub> – Manganite (γ-MnOOH) Interface: Simultaneous Adsorption, Microprecipitation, Oxidation/Reduction and Dissolution The complex interaction between Cr<sup>III</sup><sub>aq</sub> and manganite (γ-MnOOH) was systematically studied at room temperature over …
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Photon-assisted spectroscopy of electronic interface states in perovskite oxide heterostructures
… substrate and three differently doped lanthanum manganite thin films (10-15 nm thickness) grown by pulsed laser deposition (PLD) on the SrTiO3 substrate(La0.7Sr0.3MnO3, La0.7Ca0.3MnO3, La0.7Ce0.3MnO3). The first part aims at the identification of electronic surface and interface states at the …
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Nanostruktūrizuotų manganitų kobaltitų sluoksnių magnetovaržinės savybės /
… 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 size of …
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Neutron Compton scattering from hydrogen and perovskite oxide interfaces
… of two perovskite oxide interfaces: a cuprate-manganite interface, and the interface between SrTiO\(_3\) and LaAlO\(_3\). Both interfaces are investigated using the techniques of impurity theory. Firstly, a simple model of a cuprate-manganite interface is proposed to explain several recent …
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Magnetic structure in manganites as probed by magnetic force microscopy
… concerning magnetic phase transitions in the manganite La1−x−yPryCaxMnO3, which for some dopings is a colossal magnetoresistive material. I will briefly discuss two ongoing projects: the use of our magnetic force microscope to image field–dependent domain structure in patterned magnetic …
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Heteroepitaxial Interfaces Modify Collective States in Complex Oxides
… phenomena in isostructural phases. Titanates and manganites are two examples where various members of their groups have close enough lattice constants that strained superlattices involving both kinds of materials grow epitaxially. In this work aggregate response and interface effects of …
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First principles study of structure, defects and proton insertion in MnO₂
… coordinated oxygen atom. In both pyrolusite and manganite, the protons may appear to be at an octahedral center in experiments as the activation barrier for hopping between the two stable sites on each side of the octahedral position is only about 25 meV. Introduction of die Wolff disorder and …
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Structural, magnetic and electric transport properties of metal substituted La₀.₇Sr₀.₃MnO₃
… These abnormal behaviors relative to the parent manganite perovskite are explained by the competition between the double exchange and super exchange interactions, local John-Teller distortion, the dilution of magnetic ordering by the formation of AF clusters, the change of electron carrier …
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Photoinduced dynamics studied by ultrafast single-shot pump-probe spectroscopy
… by the change in phonon frequency. In a strained manganite film, we observed a photoinduced persistent insulator-to-metal transition and showed the partial recovery of the generated metallic phase to the insulating phase.
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Cathode polarization effects in rare Earth nickelate cathodes for solid oxide fuel cells
… materials, namely strontium doped lanthanum manganite, and a relatively new class of cathode materials, rare-earth nickelates. The experimentally measured relationship between cathode polarization and oxygen partial pressure will be correlated with the underlying transport and surface …
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The Interplay of Spin, Charge, and Heat: From Metal/Insulator Heterostructures to Perovskite Bilayers
… strontium ferrite (LSFO) lanthanum strontium manganite (LSMO) bilayer grown on a lanthanum strontium aluminate (LSAT) substrate. This research focuses on the possible control of magnetic moments using current pulses.</p>
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Manganese mineralization hosted by the Rocky Gap Sandstone in Bland County, Virginia
… bands, and (3) interwoven psuedomorphs after manganite. Goethite (1) a mottled and spotted variety characteristic of hand samples with sedimentary layering, (2) a homogeneous goethite , and (3) a banded goethite that occurs as a microbreccia. The paragenesis of the minerals was determined …
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Re-evaluation of Kombat-style mineralisation and implications for exploration in the Otavi mountainland, Namibia
… Fe-Mn ores, hausmannite, hematite with minor, manganite may be are considered.
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