Large Random-Field Behavior above the Vacancy Percolation Concentration Threshold : Fe_<0.84>Zn_<0.16>F_2
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概要
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High-field magnetization measurements, with H≤20T, yield the random-field Ising model (RFIM) specific heat behavior near the H-T phase boundary in Fe_<0.84>Zn_<0.16>F_2. This sample, with x greater than the magnetic vacancy percolation threshold, x_v=0.754,is in the concentration range that shows equilibrium neutron scattering line shapes at low temperature and |q| > 0,unlike samples for which x < x_v. The temperature derivative of the uniform magnetization shows the expected low-field random-field Ising scaling behavior for H≤18 T. At H=20 T, however, the peak temperature and amplitude are significantly suppressed, indicating a high-field RFIM region of the H-T phase diagram.
- 社団法人日本物理学会の論文
- 2002-02-15
著者
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MOTOKAWA Mitsuhiro
Institute for Materials Research, Tohoku University
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SAKON Takuo
Institute for Materials Research, Tohoku University
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Awaji Satoshi
High Field Laboratory For Superconducting Materials Imr Tohoku University
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Awaji Satoshi
High Field Laboratory For Superconducting Materials Institute For Materials Research Tohoku Universi
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Awaji Satoshi
High Field Laboratory For Superconducting Material Institute For Material Research Tohoku University
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Belanger David
Institute For Materials Research Tohoku University:department Of Physics University Of California
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Motokawa Mitsuhiro
Institute For Materials Research Tohoku University
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Sakon Takuo
Institute For Materials Research Tohoku University
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Motokawa Mitsuhiro
Institute For Materials Research Tohoku University:high Field Laboratory For Superconducting Materia
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