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      Microstructured magnetic tunnel junctions (invited)

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          Giant Magnetoresistance of (001)Fe/(001)Cr Magnetic Superlattices

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            A Mechanism of Magnetic Hysteresis in Heterogeneous Alloys

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              Thousandfold change in resistivity in magnetoresistive la-ca-mn-o films.

              A negative isotropic magnetoresistance effect more than three orders of magnitude larger than the typical giant magnetoresistance of some superlattice films has been observed in thin oxide films of perovskite-like La(0.67)Ca(0.33)MnOx. Epitaxial films that are grown on LaAIO(3) substrates by laser ablation and suitably heat treated exhibit magnetoresistance values as high as 127,000 percent near 77 kelvin and approximately 1300 percent near room temperature. Such a phenomenon could be useful for various magnetic and electric device applications if the observed effects of material processing are optimized. Possible mechanisms for the observed effect are discussed.
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                Author and article information

                Journal
                Journal of Applied Physics
                Journal of Applied Physics
                AIP Publishing
                0021-8979
                1089-7550
                April 15 1997
                April 15 1997
                : 81
                : 8
                : 3741-3746
                Article
                10.1063/1.364744
                1697defb-9133-49b2-8293-a73ee546e6fc
                © 1997
                History

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