New Compounds Based on Pyrochlore Structure : R_2Nb_2O_7 (R = Dy, Yb)(Condensed Matter : Electronic Structure, Electrical, Magnetic and Optical Properties)
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概要
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We have synthesized new compounds R_2Nb_2O_7 (R = Dy, Yb) based on the pyrochlore structure. Both are insulating at room temperature. Susceptibility measurements reveal that Dy_2Nb_2O_7 exhibits a spin freezing around 1 K without any long range ordering down to 0.3 K, while the Yb-based compound does not show any ordering down to 0.3 K. Specific heat measurements show that both compounds have a well-isolated doublet ground state. Magnetization and magnetic contribution to the specific heat for both systems solely come from rare earth ions, which suggests that the Nb site network has nonmagnetic state as reported for Y_2Nb_2O_7.
- 社団法人日本物理学会の論文
- 2004-10-15
著者
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SAKAI Osamu
Department of Physics, Tokyo Metropolitan University
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MAENO Yoshiteru
Department of Physics, Graduate School of Science, Kyoto University
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FUKAZAWA Hideto
Department of Physics, Chiba University
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NAKATSUJI Satoru
Department of Physics, Kyoto University
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Nishizaki S
Kyoto Univ. Kyoto Jpn
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Maeno Yoshiteru
Department Of Physics Faculty Of Science Hiroshima University
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Shirakawa N
Electrotechnical Laboratory
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Fukazawa Hideto
Department Of Physics Kyoto University : (present Address)graduate School Of Science And Technology
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Sakai Osamu
Department Of Electronic Science And Engineering Kyoto University
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Nimori Shigeki
National Institute For Materials Science
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Fukazawa H
Department Of Physics Kyoto University : (present Address)graduate School Of Science And Technology
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Fukazawa Hideto
Department Of Physics Chiba University
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HIGASHINAKA Ryuji
Department of Physics, Kyoto University
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JANA Yatramohan
Department of Physics, Kyoto University
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Nakatsuji Satoru
Department Of Physics Graduate School Of Science Kyoto University:institute For Solid State Physics
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Sakai Osamu
Department Of Physics Kyoto University
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Higashinaka Ryuji
Department Of Physics Kyoto University
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Sakai Osamu
Department Of Cardiovascular Surgery Kyoto Prefectural University Of Medicine
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Jana Yatramohan
Department Of Physics Kyoto University : International Innovation Center Kyoto University : (present
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