Abstract
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 MnO x . 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 ∼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.
References
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Dates
Type | When |
---|---|
Created | 18 years, 10 months ago (Oct. 5, 2006, 8:01 p.m.) |
Deposited | 1 year, 7 months ago (Jan. 12, 2024, 6:21 p.m.) |
Indexed | 20 hours, 44 minutes ago (Aug. 21, 2025, 12:37 p.m.) |
Issued | 31 years, 4 months ago (April 15, 1994) |
Published | 31 years, 4 months ago (April 15, 1994) |
Published Print | 31 years, 4 months ago (April 15, 1994) |
@article{Jin_1994, title={Thousandfold Change in Resistivity in Magnetoresistive La-Ca-Mn-O Films}, volume={264}, ISSN={1095-9203}, url={http://dx.doi.org/10.1126/science.264.5157.413}, DOI={10.1126/science.264.5157.413}, number={5157}, journal={Science}, publisher={American Association for the Advancement of Science (AAAS)}, author={Jin, S. and Tiefel, T. H. and McCormack, M. and Fastnacht, R. A. and Ramesh, R. and Chen, L. H.}, year={1994}, month=apr, pages={413–415} }