Pressure Effect on Yb-Based Strongly Correlated Electron Systems

• Authors: T. Mito , M. Otani , M. Nakamura , T. Koyama , S. Wada , H. Kotegawa , T. Kobayashi , B. Idzikowski , M. Reiffers , J. Sarrao
• Languages of publication: EN

Abstracts

EN

We studied pressure effects on YbCu_5 and YbInCu_4, good examples of the Yb-based compounds to investigate the nonmagnetic-magnetic transition in Yb-based strongly correlated electron systems. With increasing pressure, the low-temperature Fermi liquid state of YbCu_5 is gradually suppressed, suggesting the second-order like nonmagnetic-magnetic transition around the pressure of 5-6 GPa. On the other hand, in YbInCu_4 which has a pressure-induced magnetic ordered ground state above P_C=2.45 GPa, both high-temperature paramagnetic and low-temperature intermediate valence phases are insensitive to pressure. Our results confirm the first-order nature of the transition between the intermediate valence and magnetic ordered phases with pressure.

Keywords

EN

71.27.+a; 75.30.Kz; 75.30.Mb; 76.60.-k

Discipline

• 76.60.-k: Nuclear magnetic resonance and relaxation(see also 33.25.+k Nuclear resonance and relaxation in atomic and molecular physics and 82.56.-b Nuclear magnetic resonance in physical chemistry and chemical physics; for structure determination using magnetic resonance techniques, see 61.05.Qr; for biophysical applications, see 87.80.Lg; for NMR in superconducting materials, see 74.25.nj)
• 71.27.+a: Strongly correlated electron systems; heavy fermions
• 75.30.Mb: Valence fluctuation, Kondo lattice, and heavy-fermion phenomena(see also 71.27.+a Strongly correlated electron systems, heavy fermions; for heavy-fermion superconductors, see 74.70.Tx)
• 75.30.Kz: Magnetic phase boundaries (including classical and quantum magnetic transitions, metamagnetism, etc.)(for ferroelectric phase transitions, see 77.80.B-; for superconductivity phase diagrams, see 74.25.Dw)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2009
• Volume: 115
• Issue: 1
• Pages: 47-52

Dates

published

2009-01

Contributors

author

T. Mito

• Graduate School of Sciences, Kobe University, Nada, Kobe 657-8501, Japan

author

M. Otani

• Graduate School of Sciences, Kobe University, Nada, Kobe 657-8501, Japan

author

M. Nakamura

• Graduate School of Sciences, Kobe University, Nada, Kobe 657-8501, Japan

author

T. Koyama

• Graduate School of Sciences, Kobe University, Nada, Kobe 657-8501, Japan

author

S. Wada

• Graduate School of Sciences, Kobe University, Nada, Kobe 657-8501, Japan

author

H. Kotegawa

• Graduate School of Sciences, Okayama University, Okayama 700-8530, Japan

author

T. Kobayashi

• Graduate School of Sciences, Okayama University, Okayama 700-8530, Japan

author

B. Idzikowski

• Institute of Molecular Physics, Polish Academy of Sciences, 60-179 Poznań, Poland

author

M. Reiffers

• Institute of Experimental Physics, Slovak Academy of Sciences, 043-53 Kosice, Slovakia

author

J. Sarrao

• Los Alamos National Laboratory, Mail Stop K764, Los Alamos, New Mexico 87545, USA

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Identifiers

DOI

10.12693/APhysPolA.115.47