CAS OpenIR  > 中科院上海应用物理研究所2011-2019年
Conventional empirical law reverses in the phase transitions of 122-type iron-based superconductors
Yu, ZH; Wang, L; Wang, LH; Liu, HZ; Zhao, JG; Li, CY; Sinogeikin, S; Wu, W; Luo, JL; Wang, NL; Yang, K; Zhao, YS; Mao, HK; wanglin@hpstar.ac.cn
2014
Source PublicationSCIENTIFIC REPORTS
ISSN2045-2322
Volume4
AbstractPhase transition of solid-state materials is a fundamental research topic in condensed matter physics, materials science and geophysics. It has been well accepted and widely proven that isostructural compounds containing different cations undergo same pressure-induced phase transitions but at progressively lower pressures as the cation radii increases. However, we discovered that this conventional law reverses in the structural transitions in 122-type iron-based superconductors. In this report, a combined low temperature and high pressure X-ray diffraction (XRD) measurement has identified the phase transition curves among the tetragonal (T), orthorhombic (O) and the collapsed-tetragonal (cT) phases in the structural phase diagram of the iron-based superconductor AFe(2)As(2) (A = Ca, Sr, Eu, and Ba). The cation radii dependence of the phase transition pressure (T -> cT) shows an opposite trend in which the compounds with larger ambient radii cations have a higher transition pressure.
KeywordX-ray-diffraction High-pressure Thcr2si2-type Structure 43 k State Coordination Equations
Indexed BySCI
Language英语
WOS IDWOS:000346184200001
Citation statistics
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/14055
Collection中科院上海应用物理研究所2011-2019年
Corresponding Authorwanglin@hpstar.ac.cn
Recommended Citation
GB/T 7714
Yu, ZH,Wang, L,Wang, LH,et al. Conventional empirical law reverses in the phase transitions of 122-type iron-based superconductors[J]. SCIENTIFIC REPORTS,2014,4.
APA Yu, ZH.,Wang, L.,Wang, LH.,Liu, HZ.,Zhao, JG.,...&wanglin@hpstar.ac.cn.(2014).Conventional empirical law reverses in the phase transitions of 122-type iron-based superconductors.SCIENTIFIC REPORTS,4.
MLA Yu, ZH,et al."Conventional empirical law reverses in the phase transitions of 122-type iron-based superconductors".SCIENTIFIC REPORTS 4(2014).
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