We investigate the magnetization and the magnetostriction of the dipole-octupole quantum spin ice candidate Ce2Hf2O7 down to 50 mK. We find that the magnetization curves observed with the magnetic field applied along all the principal axes ([100], [110], and [111]) exhibit a magnetic hysteresis below around 300 mK. In addition, a kink-like feature is observed in the magnetization under B || [111], at which the magnetostriction also shows a convex field dependence. Our classical Monte-Carlo and quantum exact diagonalization calculations demonstrate that these features in the magnetization are well reproduced by the spin Hamiltonian with a dominant interaction between the octupole moments and with a QSI ground state, indicating the emergence of a dipole-octupole QSI in this compound.
@article{arxiv.2509.09189,
title = {Magnetization and magnetostriction measurements of the dipole-octupole quantum spin ice candidate Ce2Hf2O7},
author = {Edwin Kermarrec and Guanyue Chen and Hiromu Okamoto and Chun-Jiong Huang and Han Yan and Jian Yan and Hikaru Takeda and Yusei Shimizu and Evan M. Smith and Avner Fitterman and Andrea D. Bianchi and Bruce D. Gaulin and Minoru Yamashita},
journal= {arXiv preprint arXiv:2509.09189},
year = {2025}
}
Comments
10 pages, 4 figures, 1 table, and Supplementary Materials