We have measured the magnetization of the organic compound BIP-BNO (3,5'-bis(N-tert-butylaminoxyl)-3',5-dibromobiphenyl) up to 76 T where the magnetization is saturated. The S = 1/2 antiferromagnetic Heisenberg two-leg spin-ladder model accounts for the obtained experimental data regarding the magnetization curve, which is clarified using the quantum Monte Carlo method. The exchange constants on the rung and the side rail of the ladder are estimated to be J(rung)/kB = 65.7 K and J(leg)/kB = 14.1 K, respectively, deeply in the strong coupling region: J(rung)/J(leg) > 1.
@article{arxiv.1706.08008,
title = {Magnetization process of the S = 1/2 two-leg organic spin-ladder compound BIP-BNO},
author = {Kazuya Nomura and Yasuhiro H. Matsuda and Yasuo Narumi and Koichi Kindo and Shojiro Takeyama and Yuko Hosokoshi and Toshio Ono and Naoya Hasegawa and Hidemaro Suwa and Synge Todo},
journal= {arXiv preprint arXiv:1706.08008},
year = {2017}
}