TY - JOUR
T1 - Electron spin resonance measurements at ultralow temperatures
AU - Sakon, Takuo
AU - Koyama, Keiichi
AU - Motokawa, Mitsuhiro
AU - Nojiri, Hiroyuki
AU - Asano, Takayuki
AU - Ajiro, Yoshitami
N1 - Funding Information:
The authors would like to thank M. Yoshida for supporting our experiment. This investigation was performed at the High Field Laboratory for Superconducting Materials, Tohoku University. This work was supported by a Grant-in-Aid for Scientific Research from the Ministry of Education, Culture, Sports, Science and Technology of Japan.
PY - 2003/5
Y1 - 2003/5
N2 - An electron spin resonance (ESR) measurement system for use at ultralow temperatures using a 3He-4He dilution refrigerator has been developed down to 160 mK. As the first experiment, the ESR was measured on a quantum spin chain Cu benzoate, in which a field-induced gap was recently found. The evaluation of a new ESR mode, so-called breather mode, was found at the lowest temperatures. In the present work, we observed a smaller gap in H||b by suppressing of the thermal excitation.
AB - An electron spin resonance (ESR) measurement system for use at ultralow temperatures using a 3He-4He dilution refrigerator has been developed down to 160 mK. As the first experiment, the ESR was measured on a quantum spin chain Cu benzoate, in which a field-induced gap was recently found. The evaluation of a new ESR mode, so-called breather mode, was found at the lowest temperatures. In the present work, we observed a smaller gap in H||b by suppressing of the thermal excitation.
KW - Cu-benzoate
KW - Dilution refrigerator
KW - Electron spin resonance
KW - Quantum spin chain
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U2 - 10.1016/S0921-4526(02)02433-X
DO - 10.1016/S0921-4526(02)02433-X
M3 - Article
AN - SCOPUS:23044511039
SN - 0921-4526
VL - 329-333
SP - 1629
EP - 1631
JO - Physica B: Condensed Matter
JF - Physica B: Condensed Matter
IS - II
ER -