Extended X-Ray Absorption Fine Structure Study on Anharmonic Pair Potential in CuBr
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概要
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The Cu K-edge EXAFS (extended X-ray absorption fine structure) of CuBr has been measured at room temperature. An anharmonic pair potential for the Cu–Br bond introduced as Φ(u)=Φ0+(1/2!)αu2+(1/3!)βu3 in a central-field approximation is determined by numerical integration of the EXAFS function: obtained values of α and β are 2.28(4) eV/Å2 and -8(1) eV/Å3, respectively, and the Grüneisen parameter γ G=-(R0/6)(β/α) is obtained as 1.5(2) using these values. These values are concluded to be reasonable from comparison with previously obtained Grüneisen parameters and from studying phonon dispersion relations.
- Publication Office, Japanese Journal of Applied Physics, Faculty of Science, University of Tokyoの論文
- 1997-01-15
著者
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Ishii Tadao
Faculty Of Electrical Engineering Osaka University
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Kashino Setsuo
Faculty Of Science Okayama University
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Maeda Hironobu
Faculty Of Science Okayama University
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Kamishima Osamu
Faculty Of Science Okayama University
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Kashino Setsuo
Faculty of Science, Okayama University, Okayama 700, Japan
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Maeda Hironobu
Faculty of Science, Okayama University, Okayama 700, Japan
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Kamishima Osamu
Faculty of Science, Okayama University, Okayama 700, Japan
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