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This thesis presents the results of recent investigations in the field of manganites using unbiased Monte Carlo techniques. It was found that the famous colossal magnetoresistance effect in the one-orbital model stems from the competition between charge-ordered insulating and ferromagnetic metallic states, which was also observed experimentally. The multiferroicity found in the E-phase of orthorombic manganites is also discussed, as well as the novel Truncated Polynomial Expansion Monte Carlo algorithm which will allow for simulations of larger systems in the future.
Manganites, Monte Carlo, Multiferroics, Double Exchange, Colossal Magnetoresistance
Date of Defense
May 29, 2007.
Submitted Note
A Dissertation Submitted to the Department of Physics in Partial Fulfillment of the Requirements for the Degree of Doctor of Philosophy.
Bibliography Note
Includes bibliographical references.
Publisher
Florida State University
Identifier
FSU_migr_etd-1813
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