Spin Ordering in LaOFeAs and Its Suppression in Superconductor LaO0.89F0.11FeAs Probed by M\"ossbauer Spectroscopy
作者： S. Higashitaniguchi , Y. Kamihara , M. Saito , M. Seto , S. Kitao
关键词: Spin (physics) 、 Magnetic field 、 Materials science 、 Transition temperature 、 Electrical resistivity and conductivity 、 Condensed matter physics 、 Atmospheric temperature range 、 Superconductivity 、 Magnetic moment 、 Orthorhombic crystal system
摘要: The 57Fe M\"ossbauer spectroscopy was applied to an iron-based layered superconductor LaO0.89F0.11FeAs with a transition temperature of 26 K and its parent material LaOFeAs. Throughout the range from 4.2 298 K, singlet spectrum no magnetic splitting observed as main component each F-doped superconductor. No additional internal field for measured at under 7 T. On other hand, LaOFeAs shows around 140 this is slightly lower than that structural phase tetragonal orthorhombic phase, which accompanies resistivity anomaly 150 K. moment estimated be ~0.35 $\mu$B/Fe in spin disorder remains ordered state even fact T implies strong fluctuation above Tc or small system. Therefore, present results show F-doping effectively suppresses transitions suppression leads emergence superconductivity
arxiv.org
sci-hub.st 参考文章(15)
J. G. Bednorz, K. A. M�ller, Possible high Tc superconductivity in the Ba-La-Cu-O system European Physical Journal B. ,vol. 64, pp. 189- 193 ,(1986) , 10.1007/BF01303701
Katsuya Shimizu, Tomohiro Kimura, Shigeyuki Furomoto, Keiki Takeda, Kazuyoshi Kontani, Yoshichika Onuki, Kiichi Amaya, Superconductivity in the non-magnetic state of iron under pressure. Nature. ,vol. 412, pp. 316- 318 ,(2001) , 10.1038/35085536
P Raj, S K Kulshreshtha, Mössbauer Studies of Fe2As Physica Scripta. ,vol. 14, pp. 125- 128 ,(1976) , 10.1088/0031-8949/14/3/010
David J Singh, M-H Du, None, Density functional study of LaFeAsO(1-x)F(x): a low carrier density superconductor near itinerant magnetism. Physical Review Letters. ,vol. 100, pp. 237003- ,(2008) , 10.1103/PHYSREVLETT.100.237003
Motoyoshi Yuzuri, Ryoichi Tahara, Yoji Nakamura, Mössbauer Study of Iron-Arsenic Compounds Journal of the Physical Society of Japan. ,vol. 48, pp. 1937- 1941 ,(1980) , 10.1143/JPSJ.48.1937
L Häggström, A Gustavsson-Seidel, H Fjellvåg, A Mössbauer Study of Helimagnetic FeAs EPL. ,vol. 9, pp. 87- 92 ,(1989) , 10.1209/0295-5075/9/1/016
Yoichi Kamihara, Hidenori Hiramatsu, Masahiro Hirano, Ryuto Kawamura, Hiroshi Yanagi, Toshio Kamiya, Hideo Hosono, Iron-Based Layered Superconductor: LaOFeP Journal of the American Chemical Society. ,vol. 128, pp. 10012- 10013 ,(2006) , 10.1021/JA063355C
Yoichi Kamihara, Takumi Watanabe, Masahiro Hirano, Hideo Hosono, Iron-Based Layered Superconductor La[O1-xFx]FeAs (x = 0.05−0.12) with Tc = 26 K Journal of the American Chemical Society. ,vol. 130, pp. 3296- 3297 ,(2008) , 10.1021/JA800073M
Clarina de la Cruz, Q. Huang, J. W. Lynn, Jiying Li, W. Ratcliff II, J. L. Zarestky, H. A. Mook, G. F. Chen, J. L. Luo, N. L. Wang, Pengcheng Dai, Magnetic order close to superconductivity in the iron-based layered LaO1-xFxFeAs systems Nature. ,vol. 453, pp. 899- 902 ,(2008) , 10.1038/NATURE07057
S K Kulshreshtha, P Raj, Mossbauer studies of helimagnetic FeAs Journal of Physics F: Metal Physics. ,vol. 9, pp. 2253- 2259 ,(1979) , 10.1088/0305-4608/9/11/015