@article{e0758b7eda314660ba6e7f10ca510db0,
title = "Anisotropic magnetic fluctuations in ferromagnetic superconductor UGe2:73Ge-NQR study at ambient pressure",
abstract = "We report a 73Ge nuclear quadrupole resonance reinvestigation of the ferromagnetic (FM) superconductor UGe2 at ambient pressure. Careful measurement and analysis of the paramagnetic (PM) spectrum taking into account the calculated electric field gradient (EFG) resulted in modification of the previously reported site assignments for three inequivalent Ge sites. The crossover anomaly at Tx in the FM state is not clearly seen in the temperature dependence of the static internal field at the Ge site, whereas it appears in the nuclear spin–lattice relaxation rate, 1/T1. A remarkable site dependence of 1/T1 is observed among the inequivalent Ge sites, where the directions of the principal axes of the EFG are different. This result reveals that the magnetic fluctuation of UGe2 is highly anisotropic, which is consistent with the presence of Ising magnetic fluctuations in the PM state.",
author = "Yuichiro Noma and Hisashi Kotegawa and Tetsuro Kubo and Hideki Tou and Hisatomo Harima and Yoshinori Haga and Etsuji Yamamoto and Yoshichika Ōnuki and Itoh, {Kohei M.} and Haller, {Eugene E.} and Ai Nakamura and Yoshiya Homma and Fuminori Honda and Dai Aoki",
note = "Funding Information: 1Department of Physics, Kobe University, Kobe 657-8501, Japan 2Advanced Science Research Center, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, Japan 3Faculty of Science, University of the Ryukyus, Nishihara, Okinawa 903-0213, Japan 4School of Fundamental Science and Technology, Keio University, Yokohama 223-8522, Japan 5Lawrence Berkeley Laboratory, University of California, Berkeley, CA 94720, U.S.A. 6Institute for Materials Research, Tohoku University, Oarai, Ibaraki 311-1313, Japan Funding Information: Acknowledgements This work was supported in part by Grants-in-Aid for Scientific Research (Nos. 15H03689, 15H05745, 15H05885, and 26400359) from the Ministry of Education, Culture, Sports, Science and Technology (MEXT) of Japan. Publisher Copyright: {\textcopyright} 2018 The Physical Society of Japan.",
year = "2018",
doi = "10.7566/JPSJ.87.033704",
language = "English",
volume = "87",
journal = "journal of the physical society of japan",
issn = "0031-9015",
publisher = "Physical Society of Japan",
number = "3",
}