Large low-field magnetoresistance of phase-separated single-crystalline Pr0.7Pb0.3MnO3
A large low-field magnetoresistance (MR) slightly above the metal–insulator transition temperature (234 K) was observed in single-crystalline Pr0.7Pb0.3MnO3. Combining the temperature dependence of magnetization, resistance, and electron spin resonance spectra, it was suggested that phase separation...
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| Veröffentlicht in: | Applied physics letters 2002-05, Vol.80 (18), p.3367-3369 |
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| container_title | Applied physics letters |
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| creator | Li, Run-Wei Wang, Zhi-Hong Wang, Wei-Ning Sun, Ji-Rong Li, Qing-An Zhang, Shao-Ying Cheng, Zhao-Hua Shen, Bao-Gen Gu, Ben-Xi |
| description | A large low-field magnetoresistance (MR) slightly above the metal–insulator transition temperature (234 K) was observed in single-crystalline Pr0.7Pb0.3MnO3. Combining the temperature dependence of magnetization, resistance, and electron spin resonance spectra, it was suggested that phase separation occurs above the Curie temperature; ferromagnetic metallic clusters imbedding in the insulating paramagnetic matrix, and spin-polarized electron tunneling between isolated ferromagnetic clusters should be responsible for the large low-field MR observed. Undoubtedly, this observation opens a window to explore large low-field MR at high temperature, which is very important for the practical application of colossal MR effect. |
| doi_str_mv | 10.1063/1.1477940 |
| format | Article |
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Combining the temperature dependence of magnetization, resistance, and electron spin resonance spectra, it was suggested that phase separation occurs above the Curie temperature; ferromagnetic metallic clusters imbedding in the insulating paramagnetic matrix, and spin-polarized electron tunneling between isolated ferromagnetic clusters should be responsible for the large low-field MR observed. 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Combining the temperature dependence of magnetization, resistance, and electron spin resonance spectra, it was suggested that phase separation occurs above the Curie temperature; ferromagnetic metallic clusters imbedding in the insulating paramagnetic matrix, and spin-polarized electron tunneling between isolated ferromagnetic clusters should be responsible for the large low-field MR observed. 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| ispartof | Applied physics letters, 2002-05, Vol.80 (18), p.3367-3369 |
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| language | eng |
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| source | AIP Journals Complete; AIP Digital Archive |
| title | Large low-field magnetoresistance of phase-separated single-crystalline Pr0.7Pb0.3MnO3 |
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