Stray field and spin-imbalance effects in La0:7Ca0:3MnO3=YBa2Cu3O7 d multilayers
نویسندگان
چکیده
In-plane resistance and magnetization measurements were performed on La0:7Ca0:3MnO3=YBa2Cu3O7 d=La0:7Ca0:3MnO3 (LCMO/ YBCO/LCMO) trilayers below the superconducting transition temperature of the YBCO layer. Two magnetoresistance (MR) peaks were found: The first MR peak is consistent with the suppression of superconductivity due to the stray fields generated by the domain walls and the second one is most likely the result of the antiparallel orientation of the net magnetic moment of the top and bottom LCMO layers. Published by Elsevier B.V. PACS: 74.78.Fk; 72.25. b; 73.43.Qt
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CSIRO PUBLISHING for CSIRO Australia and the Australian Academy of Science
An optical study has been made of La0 ·7Ca0 ·3MnO3 and La0 ·8Li0 ·2MnO3 in the infrared spectral region (100 cm−1 to 4000 cm−1). The transmission of all samples is negligible. The photoconductive response is also unmeasurable. The data reported are therefore restricted to reflectivity measurements. At room temperature, both materials exhibit similar ‘bending’ and ‘stretching’ phonon modes, asso...
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