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Resistivity anomalies for ferromagnetic metals at curie points. II. Short-range magnetization fluctuations

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Abstract

Using the itinerant model of magnetic moment in ferromagnetic metals, we have investigated the resistivity anomalies near the Curie temperatureT c . In this paper, the short-range magnetization fluctuations have been taken into account in calculating the spin correlation function in the paramagnetic region. The mean free path is considered to be comparable with the correlation length and to be temperature dependent nearT c . A critical exponent is introduced for the mean free path and its value is established to be not smaller than 1/2. The resistivity is found to be continuous throughT c . The temperature derivative of the resistivity is found to be divergent linearly and positively near and aboveT c . These results confirm the phase transition nature of the resistivity anomalies of the ferromagnetic metals nearT c and show that the short-range order must also exist in the itinerant model of the magnetic electrons.

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Authors and Affiliations

  1. Department of Physics, National Taiwan University, Taipei, Republic of China

    Der-Ruenn Su

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  1. Der-Ruenn Su
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Su, DR. Resistivity anomalies for ferromagnetic metals at curie points. II. Short-range magnetization fluctuations. J Low Temp Phys 24, 701–708 (1976). https://doi.org/10.1007/BF00657175

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  • DOI: https://doi.org/10.1007/BF00657175

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