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Strain driven anisotropic magnetoresistance in antiferromagnetic La0.4Sr0.6MnO3
We investigate the effects of strain on antiferromagnetic (AFM) single crystal thin films of La1−xSrxMnO3 (x = 0.6). Nominally unstrained samples have strong magnetoresistance with anisotropic magnetoresistances (AMR) of up to 8%. Compressive strain suppresses magnetoresistance but generates AMR val...
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Published in: | Applied physics letters 2014-08, Vol.105 (5) |
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Main Authors: | , , , , , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | We investigate the effects of strain on antiferromagnetic (AFM) single crystal thin films of La1−xSrxMnO3 (x = 0.6). Nominally unstrained samples have strong magnetoresistance with anisotropic magnetoresistances (AMR) of up to 8%. Compressive strain suppresses magnetoresistance but generates AMR values of up to 63%. Tensile strain presents the only case of a metal-insulator transition and demonstrates a previously unreported AMR behavior. In all three cases, we find evidence of magnetic ordering and no indication of a global ferromagnetic phase transition. These behaviors are attributed to epitaxy induced changes in orbital occupation driving different magnetic ordering types. Our findings suggest that different AFM ordering types have a profound impact on the AMR magnitude and character. |
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ISSN: | 0003-6951 1077-3118 |
DOI: | 10.1063/1.4892420 |