Magnetic and Structural Phase Transitions of EuFe2As2 Studied via Neutron and Resonant X-ray Scattering
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概要
- 論文の詳細を見る
Employing neutron and resonant x-ray scatterings, we have investigated the magnetic and structural phase transitions of a high quality single crystal of undoped pnictide EuFe2As2 to reveal the nature of these transitions. It has been found that structural order parameter $\delta=(a-b)/(a+b)$ and the square of Fe magnetic order parameter have the same temperature dependence, which is attributed to the linear-quadratic coupling between structural and Fe magnetic order parameters in the Landau free-energy expansion. This result also suggests that Fe magnetic order drives the structural phase transition which is the weak first-order phase transition.
- 2010-11-15
著者
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LEE Chang-Hee
Korea Advanced Institute of Science and Technology (KAIST)
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Lee Ki
Department Of Aquaculture Cheju National University
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Koo Tae
Department Of Physics Pohang University Of Science And Technology
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Kim Ki
Deparment Of Obstetrics & Gynecology College Of Medicine Pusan National University
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Cho Sung
Department Of Anatomy Seoul National University College Of Medicine
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Jeong Yoon
Department Of Physics And Electron Spin Science Center Pohang Univ. Of Science And Technology
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Cho Beong-ki
Department Of Materials Science And Engineering Gwangju Institute Of Science And Technology
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Park Sang-Youn
Department of Physics, POSTECH, Pohang 790-784, Korea
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Kim Ju-Young
Department of Nanobio Materials and Electronics and Department of Materials Science and Engineering, GIST, Gwangju 500-712, Korea
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Kim Heon-Jung
Department of Physics, Daegu University, Kyoungsan 712-714, Korea
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Park Yong
Pohang Accelerator Laboratory, POSTECH, Pohang 790-784, Korea
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Hong Kun-Pyo
Korea Atomic Energy Research Institute, Taejon 305-600, Korea
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Koo Japil
Department of Physics, POSTECH, Pohang 790-784, Korea
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Park Jihwey
Department of Physics, POSTECH, Pohang 790-784, Korea
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Jeong Yoon
Department of Physics, POSTECH, Pohang 790-784, Korea
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Cho Sung
Department of Physics, POSTECH, Pohang 790-784, Korea
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Koo Tae
Department of Physics, POSTECH, Pohang 790-784, Korea
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Kim Ju-Young
Department of Combative Martial Arts Training, College of Martial Arts, Yongin University, Republic of Korea
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