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Insulator-metal transition shift related to magnetic polarons in La0.67-xYxCa0.33MnO3 | | G. Li
; S. -J. Feng
; F. Liu
; Y. Yang
; R. -K. Zheng
; T. Qian
; X. -Y. Guo
; X. -G. Li
; | | Date: |
16 Dec 2002 | | Subject: | Strongly Correlated Electrons | cond-mat.str-el | | Abstract: | The magnetic transport properties have been measured for La0.67-xYxCa0.33MnO3 (0 <= x <= 0.14) system. It was found that the transition temperature Tp almost linearly moves to higher temperature as H increases. Electron spin resonance confirms that above Tp, there exist ferromagnetic clusters. From the magnetic polaron point of view, the shift of Tp vs. H was understood, and it was estimated that the size of the magnetic polaron is of 9.7~15.4 angstrom which is consistent with the magnetic correlation length revealed by the small-angle neutron-scattering technique. The transport properties at temperatures higher than Tp conform to the variable-range hopping mechanism. | | Source: | arXiv, cond-mat/0301283 | | Services: | Forum | Review | PDF | Favorites | |
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