Unusual antiferromagnetic state in Si-doped CuGeO3 single crystals studied by specific-heat measurements in magnetic fields

M. Hiroi, T. Hamamoto, M. Sera, H. Nojiri, N. Kobayashi, M. Motokawa, O. Fujita, A. Ogiwara, Jun Akimitsu

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

We report the results of specific-heat measurements of CuGe1-xSixO3 (x=0, 0.01, 0.02) single crystals in magnetic fields up to 15 T. For x=0.02, a sharp transition was observed at the Néel temperature TN=4.8 K, which is almost constant up to 15 T. For x=0.01, two broad transitions were observed at the spin-Peierls transition temperature TSP=10.8 K and TN=2.5 K in zero magnetic field. The antiferromagnetic state is changed drastically by the magnetic field and the magnetic-field-induced magnetic state was observed by specific-heat measurements. The magnetic phase diagram of CuGe1-xSixO3 was determined from specific-heat, thermal-expansion, and magnetization measurements.

Original languageEnglish
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume55
Issue number10
Publication statusPublished - Mar 1 1997
Externally publishedYes

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Thermal variables measurement
doped crystals
Specific heat
heat measurement
specific heat
Single crystals
Magnetic fields
single crystals
magnetic fields
spin temperature
Superconducting transition temperature
Phase diagrams
Thermal expansion
thermal expansion
Magnetization
transition temperature
phase diagrams
magnetization
Temperature
temperature

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Unusual antiferromagnetic state in Si-doped CuGeO3 single crystals studied by specific-heat measurements in magnetic fields. / Hiroi, M.; Hamamoto, T.; Sera, M.; Nojiri, H.; Kobayashi, N.; Motokawa, M.; Fujita, O.; Ogiwara, A.; Akimitsu, Jun.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 55, No. 10, 01.03.1997.

Research output: Contribution to journalArticle

Hiroi, M. ; Hamamoto, T. ; Sera, M. ; Nojiri, H. ; Kobayashi, N. ; Motokawa, M. ; Fujita, O. ; Ogiwara, A. ; Akimitsu, Jun. / Unusual antiferromagnetic state in Si-doped CuGeO3 single crystals studied by specific-heat measurements in magnetic fields. In: Physical Review B - Condensed Matter and Materials Physics. 1997 ; Vol. 55, No. 10.
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AU - Hiroi, M.

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AU - Sera, M.

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AU - Kobayashi, N.

AU - Motokawa, M.

AU - Fujita, O.

AU - Ogiwara, A.

AU - Akimitsu, Jun

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