TY - JOUR
T1 - Unusual antiferromagnetic state in Si-dopedssingle crystals studied by specific-heat measurements in magnetic fields
AU - Hiroi, M.
AU - Hamamoto, T.
AU - Sera, M.
AU - Nojiri, H.
AU - Kobayashi, N.
AU - Motokawa, M.
AU - Fujita, O.
AU - Ogiwara, A.
AU - Akimitsu, J.
PY - 1997
Y1 - 1997
N2 - We report the results of specific-heat measurements of (Formula presented)(Formula presented)(Formula presented) (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 (Formula presented)=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 (Formula presented)=10.8 K and (Formula presented)=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 (Formula presented)(Formula presented)(Formula presented) was determined from specific-heat, thermal-expansion, and magnetization measurements.
AB - We report the results of specific-heat measurements of (Formula presented)(Formula presented)(Formula presented) (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 (Formula presented)=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 (Formula presented)=10.8 K and (Formula presented)=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 (Formula presented)(Formula presented)(Formula presented) was determined from specific-heat, thermal-expansion, and magnetization measurements.
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U2 - 10.1103/PhysRevB.55.R6125
DO - 10.1103/PhysRevB.55.R6125
M3 - Article
AN - SCOPUS:0001491289
SN - 1098-0121
VL - 55
SP - R6125-R6128
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 10
ER -