@article{2a679784e091411aba802b3957693c0d,
title = "Anisotropy in superconductivity and magnetism of PrFeAsO 1-δ single crystal",
abstract = "The magnetic torque of a high-quality PrFeAsO 1-δ single crystal has been investigated at temperatures from 2 to 200 K in 1 and 5 T. The superconducting anisotropy in PrFeAsO 1-δ can well be approximated by the single-band Kogan torque theory. The superconducting anisotropy of PrFeAsO 1-δ determined by analyzing the torque curve is weakly dependent upon changing temperature. The magnetism contribution to the torque from magnetic Pr ions becomes appreciable compared to the superconducting component. We argue that the Pr ions in the superconducting PrFeAsO 1-δ single crystal show an antiferromagnetic spin ordering at 14 K. The spin structure thus reduced from the torque measurements is different from what neutron diffraction measurements predicted using polycrystalline specimen.",
author = "Daichi Kubota and Takekazu Ishida and Motoyuki Ishikado and Shamoto, {Shin Ichi} and Hiroshi Eisaki and Hijiri Kito and Akira Iyo",
note = "Funding Information: Fig. 3 (Color online) (a) The temperature dependence of the raw sin 2θ amplitude (open square) in the PrFeAsO1−δ torque curve. The red solid curve represents the pure PM contribution estimated from Curie–Weiss law in the range of temperature in normal state between 44.5 and 160 K in 1 T. The calculating line is yielded to the sin 2θ amplitude asC/↼T −Θ↽+Offset = 2.84/↼T +13.0↽−0.017. (b) We obtain the nonmagnetic (superconducting) sin 2θ contribution subtracting the raw sin 2θ data from the assuming data on the red solid line in (a) Acknowledgements This work was partly supported by a Grant-in-Aid for Scientific Research from the Ministry of Education, Culture, Sports, Science and Technology of Japan (Grant No. 19206104) and a special grant from Osaka Prefecture University.",
year = "2010",
month = aug,
doi = "10.1007/s10948-010-0714-z",
language = "English",
volume = "23",
pages = "1067--1070",
journal = "Journal of Superconductivity and Novel Magnetism",
issn = "1557-1939",
publisher = "Springer New York",
number = "6",
}