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19 April 2024 |
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Anisotropic magnetoresistance involves metal-insulator transition in single crystal La0.77Ca0.23MnO3 | | Wanjun Jiang
; XueZhi Zhou
; H. P. Kunkel
; Gwyn Williams
; Y. Mukovskii
; K. Glazyrin
; | | Date: |
29 Oct 2007 | | Abstract: | We report anisotropic magnetoresistance (AMR) behaviors related to the
metal-insulator transition (MIT) in a colossal-magnetoresistance (CMR) single
crystal of composition La0.77Ca0.23MnO3, i.e., as MIT temperature (Tmi) driven
by the applied magnetic field, the associated AMR exhibits completely different
characteristics. At 180 K < Curie temperature TC=185 K, it presents a pure
ferromagnetic (FM) behavior related to the crystalline anisotropy. While system
evolves into temperatures between TC=185 K and Tmi(9T)=256 K, AMR complexities
were explained in the mixture of low field paramagnetic (PM) and high field
driven FM states. At 280 K, the pure PM state, we still observe the onset of
field-dependent-continuous-increasing AMR. | | Source: | arXiv, 0710.5537 | | Services: | Forum | Review | PDF | Favorites | |
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