Novel normal-state low field microwave absorption in SmFeAsO 1−x F x iron pnictide superconductors
SmFeAsO 1-x F x铁pnictide超导体的新型正态低场微波吸收
作者: R.B. OnyanchaJ. ShimoyamaJayashree DasH. OginoU.O. AigbeV.V. Srinivasu
作者单位: 1Department of Physics, University of South Africa, Johannesburg, 1710, South Africa
2Department of Physics and Mathematics, 5-10-1 Fuchinobe, Chuo-ku, Sagamihara, 252-5258, Japan
3Department of Physics, Silicon Institute of Technology, Bhubaneswar, 751024, Odisha, India
4National Institute of Advanced Industrial Science and Technology, 1-1-1 Central 2, Tsukuba, Ibaraki, 305-8568, Japan
5Department of Physics and Space Science, Technical University of Kenya, P.o Box 52428-00200, Nairobi, Kenya
刊名: Solid State Communications, 2020, Vol.307
来源数据库: Elsevier Journal
DOI: 10.1016/j.ssc.2019.113800
英文摘要: Abstract(#br)We report on the systematic normal and superconducting states microwave absorption studies in polycrystalline samples of SmFeAsO 1 − x F x using an electron spin resonance (ESR) spectrometer. In the normal state, we observed two absorption spectra; at high fields (~3500 G) and low fields (around 0 G). The high field spectrum is in principle a resonance spectrum corresponding to a saturated state. It was observed that this signal broadens and its peak to peak intensity decreases on cooling the sample from room temperature. Ultimately, the signal becomes ESR ‘silent’ in the superconducting state. On the other hand, the low field microwave absorption (LFMA), centered around zero field, was observed for the first time, in a superconducting material. Based on the line-width,...
全文获取路径: Elsevier  (合作)
影响因子:1.534 (2012)

  • pnictide 磷族元素化物
  • microwave 微波
  • absorption 吸收
  • field 
  • state 状态
  • normal 法线