TY - JOUR
T1 - 125Te-NMR study on a single crystal of heavy fermion superconductor Ute2
AU - Tokunaga, Yo
AU - Sakai, Hironori
AU - Kambe, Shinsaku
AU - Hattori, Taisuke
AU - Higa, Nonoka
AU - Nakamine, Genki
AU - Kitagawa, Shunsaku
AU - Ishida, Kenji
AU - Nakamura, Ai
AU - Shimizu, Yusei
AU - Homma, Yoshiya
AU - Li, De Xin
AU - Honda, Fuminori
AU - Aoki, Dai
N1 - Funding Information:
Acknowledgments We would like to thank R. E. Walstedt and Y. Yanase for valuable discussions. A part of this work was supported by JSPS KAKENHI Grant Numbers JP15KK0174, JP15H05745, JP15H05884, JP15H05882, JP15K21732, JP16KK0106, JP16H04006, 19K03726, JP19H00646, ICC-IMR, and the REIMEI Research Program of JAEA.
Publisher Copyright:
© 2019 The Physical Society of Japan
PY - 2019
Y1 - 2019
N2 - We report 125Te NMR studies on a newly discovered heavy fermion superconductor UTe2. Using a single crystal, we have measured the 125Te NMR Knight shift K and spin-lattice relaxation rate 1=T1 for fields along the three orthorhombic crystal axes. The data confirm a moderate Ising anisotropy for both the static (K) and dynamical susceptibilities (1=T1) in the paramagnetic state above about 20 K. Around 20 K, however, we have observed a sudden loss of NMR spin-echo signal due to sudden enhancement of the NMR spin-spin relaxation rate 1=T2, when the field is applied along the easy axis of magnetization (= a-axis). This behavior suggests the development of longitudinal magnetic fluctuations along the a-axis at very low frequencies below 20 K.
AB - We report 125Te NMR studies on a newly discovered heavy fermion superconductor UTe2. Using a single crystal, we have measured the 125Te NMR Knight shift K and spin-lattice relaxation rate 1=T1 for fields along the three orthorhombic crystal axes. The data confirm a moderate Ising anisotropy for both the static (K) and dynamical susceptibilities (1=T1) in the paramagnetic state above about 20 K. Around 20 K, however, we have observed a sudden loss of NMR spin-echo signal due to sudden enhancement of the NMR spin-spin relaxation rate 1=T2, when the field is applied along the easy axis of magnetization (= a-axis). This behavior suggests the development of longitudinal magnetic fluctuations along the a-axis at very low frequencies below 20 K.
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U2 - 10.7566/JPSJ.88.073701
DO - 10.7566/JPSJ.88.073701
M3 - Article
AN - SCOPUS:85068442421
SN - 0031-9015
VL - 88
JO - journal of the physical society of japan
JF - journal of the physical society of japan
IS - 7
M1 - 073701
ER -