TY - JOUR
T1 - NMR observation of ferro-quadrupole order in PrTi2Al20
AU - Taniguchi, Takanori
AU - Yoshida, Makoto
AU - Takeda, Hikaru
AU - Takigawa, Masashi
AU - Tsujimoto, Masaki
AU - Sakai, Akito
AU - Matsumoto, Yosuke
AU - Nakatsuji, Satoru
N1 - Funding Information:
We would like to thank T. Arima, H. Harima, K. Hattori, T. Sakakibara, and H. Tsunetsugu for stimulating discussions and T. J. Sato for informing us of unpublished neutron data. This work was supported by the Japan Society for the Promotion of Science through Grants-in-Aid for Scientific Research (KAKENHI Grant Numbers 25287083, 15H05882, and 15H05883) and the Program for Advancing Strategic International Networks to Accelerate the Circulation of Talented Researchers (No. R2604). T.T. was supported by JSPS through the Program for Leading Graduate Schools (MERIT).
Publisher Copyright:
©2016 The Physical Society of Japan.
PY - 2016/11/15
Y1 - 2016/11/15
N2 - We report the results of 27Al-NMR measurements on a single crystal of PrTi2Al20. This compound shows a phase transition near 2 K associated with the quadrupole degree of freedom of Pr ions, for which the ground state of the crystalline electric field is a nonmagnetic doublet. When a magnetic field is applied along the '111' direction, the NMR lines split upon entering the low-temperature phase, indicating the breaking of the three fold rotation symmetry due to the field-induced magnetic dipole perpendicular to the field. This provides microscopic evidence for a ferro order of the O20 quadrupole. Although a first-order transition is expected theoretically, the line splitting evolves continuously within the experimental resolution.
AB - We report the results of 27Al-NMR measurements on a single crystal of PrTi2Al20. This compound shows a phase transition near 2 K associated with the quadrupole degree of freedom of Pr ions, for which the ground state of the crystalline electric field is a nonmagnetic doublet. When a magnetic field is applied along the '111' direction, the NMR lines split upon entering the low-temperature phase, indicating the breaking of the three fold rotation symmetry due to the field-induced magnetic dipole perpendicular to the field. This provides microscopic evidence for a ferro order of the O20 quadrupole. Although a first-order transition is expected theoretically, the line splitting evolves continuously within the experimental resolution.
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U2 - 10.7566/JPSJ.85.113703
DO - 10.7566/JPSJ.85.113703
M3 - Article
AN - SCOPUS:84994762918
SN - 0031-9015
VL - 85
JO - Journal of the Physical Society of Japan
JF - Journal of the Physical Society of Japan
IS - 11
M1 - 113703
ER -