Electronic and magnetic phase diagram of superconductors, SmFeAsO1-xFx

被引：69
|
作者：
Kamihara, Yoichi [1 ,2 ]
Nomura, Takatoshi
Hirano, Masahiro [2 ]
Kim, Jung Eun [3 ]
Kato, Kenichi [4 ]
Takata, Masaki [3 ,4 ]
Kobayashi, Yasuhiro [5 ,6 ]
Kitao, Shinji [5 ,6 ]
Higashitaniguchi, Satoshi [5 ,6 ]
Yoda, Yoshitaka [3 ,6 ]
Seto, Makoto [5 ,6 ,7 ]
Hosono, Hideo [2 ]
机构：
[1] Tokyo Inst Technol, JST, TRiP, Mat & Struct Lab,Midori Ku, Yokohama, Kanagawa 2268503, Japan
[2] Tokyo Inst Technol, JST, ERATO, Frontier Res Ctr,SORST,Midori Ku, Yokohama, Kanagawa 2268503, Japan
[3] Japan Synchrotron Radiat Res Inst, Sayo, Hyogo 6795198, Japan
[4] RIKEN, Sayo, Hyogo 6795148, Japan
[5] Kyoto Univ, Inst Res Reactor, Kumatori, Osaka 5900494, Japan
[6] JST, CREST, Kawaguchi, Saitama 3320012, Japan
[7] Japan Atom Energy Agcy, Sayo, Hyogo 6795148, Japan
来源：
NEW JOURNAL OF PHYSICS | 2010年 / 12卷
关键词：
LAYERED QUATERNARY COMPOUND; ZRCUSIAS TYPE-STRUCTURE; MOSSBAUER-SPECTROSCOPY; SCATTERING; NUCLEAR; METAL; ORDER; TIME;
D O I：
10.1088/1367-2630/12/3/033005
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
A crystallographic and magnetic phase diagram of SmFeAsO1-xFx is determined as a function of x in terms of temperature based on electrical transport and magnetization, synchrotron powder x-ray diffraction, Fe-57 Mossbauer spectra (MS), and Sm-149 nuclear resonant forward scattering (NRFS) measurements. MS revealed that the magnetic moments of Fe were aligned antiferromagnetically at similar to 144K (T-N(Fe)). The magnetic moment of Fe (M-Fe) is estimated to be 0.34 mu(B)/Fe at 4.2K for undoped SmFeAsO; M-Fe is quenched in superconducting F-doped SmFeAsO. Sm-149 NRFS spectra revealed that the magnetic moments of Sm start to order antiferromagnetically at 5.6K (undoped) and 4.4K (T-N(Sm)) (x = 0.069). Results clearly indicate that the antiferromagnetic (AF) Sm sublattice coexists with the superconducting phase in SmFeAsO1-xFx below T-N(Sm), while the AF Fe sublattice does not coexist with the superconducting phase.
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页数：14
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