Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 8 of 8 for “"Antiferromagnetic Insulator"”.
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Quantitative study on current-induced effects in an antiferromagnetic insulator/Pt bilayer film
… of the recent prototypical spinorbit torque antiferromagnetic memory devices requires more quantitative and systematic study. In this thesis, we study the current-induced switching in a canted antiferromagnetic insulator [alpha]-Fe2O3. The (0001) oriented films were epitaxially grown on …
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Current-induced Dynamics of Easy-Plane Antiferromagnets
Antiferromagnetic memory devices are expected to be very fast, stable, dense and energy-efficient, making them promising for the next generation non-volatile random-access memory. However, in antiferromagnets, it used to be challenging to accurately understand the current-induced dynamics, …
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Study on structure, surface morphology, electrical and magnetic properties in monovalent doped Pr0.75Na0.25Mn1-xCrxO3 AND Nd0.75Na0.25Mn1-yCryO3 of magnetic ceramics
… compounds (x = 0 and y = 0) showed paramagnetic-insulator down to lower temperature. Interestingly, increasing of Cr for Pr0.75Na0.25Mn1-xCrxO3 compound showed ferromagnetic-metallic (FMM) transition for x = 0.02 and x = 0.04 samples. Metal-insulator transition temperature, TMI were found to be …
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Phase Coexistence in Manganites
… between a ferromagnetic metal (FM) and an antiferromagnetic insulator (AF). The first part of the dissertation describes a systematic study on a series of La1-xCaxMnO3 films deposited onto SrTiO3 (001) by pulsed laser deposition with compositions in the range 0.40<x<0.45. From electrical …
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A study of oxide superconductors by electron energy loss spectroscopy in STEM.
… material is a superconductor, and when O=l an antiferromagnetic insulator. In the production of bulk superconductors the oxygen anneal is therefore important in determining the properties of the sample. Studies on critical currents in bulk materials and single cystals have shown that the …
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Spin and Charge Transport in Metallic Ferrimagnets and Disordered Magnetic Oxides
… applications in spintronic devices. Due to the antiferromagnetic exchange interaction, ferrimagnetic materials offer the ultrafast dynamics of the antiferromagnetic exchange, with a net magnetization that can be influenced externally. With two, or more, competing ferromagnet sublattices, …
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Complex phase behavior of exotic oxides: optical spectroscopy studies
… (0.2 :::; x :::; 0.5), where a paramagnetic insulator to ferromagnetic metal transition takes place with a large value of magnetoresistance at the transition, we observed that carriers are localized as small polarons in the high temperature paramagnetic phase, which contribute to the …
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Penetration depth measurements of organic superconductors
… material separates into superconducting (SC) and antiferromagnetic (AFI) phases. The relative amounts of SC and AFI phases has been shown to depend on the cooling rate of these materials in the vicinity of 80 K. In varying the cooling rate from 0.0025-180 K/min, the Meissner fraction appears to …