TY - JOUR
T1 - Common crystalline and magnetic structure of superconducting A 2Fe4Se5 (A=K,Rb,Cs,Tl) single crystals measured using neutron diffraction
AU - Ye, F.
AU - Chi, S.
AU - Bao, Wei
AU - Wang, X. F.
AU - Ying, J. J.
AU - Chen, X. H.
AU - Wang, H. D.
AU - Dong, C. H.
AU - Fang, Minghu
PY - 2011/9/19
Y1 - 2011/9/19
N2 - Single-crystal neutron diffraction studies on superconductors A 2Fe4Se5, where A=Rb, Cs, (Tl, Rb), and (Tl, K) (Tc∼30K), uncover the same Fe vacancy ordered crystal structure and the same block antiferromagnetic order as in K2Fe 4Se5. The Fe order-disorder transition occurs at T S=500-578K, and the antiferromagnetic transition at T N=471-559K with an ordered magnetic moment ∼3.3μB/ Fe at 10 K. Thus, all recently discovered A intercalated iron selenide superconductors share the common crystalline and magnetic structure, which are very different from previous families of Fe-based superconductors, and constitute a distinct new 245 family.
AB - Single-crystal neutron diffraction studies on superconductors A 2Fe4Se5, where A=Rb, Cs, (Tl, Rb), and (Tl, K) (Tc∼30K), uncover the same Fe vacancy ordered crystal structure and the same block antiferromagnetic order as in K2Fe 4Se5. The Fe order-disorder transition occurs at T S=500-578K, and the antiferromagnetic transition at T N=471-559K with an ordered magnetic moment ∼3.3μB/ Fe at 10 K. Thus, all recently discovered A intercalated iron selenide superconductors share the common crystalline and magnetic structure, which are very different from previous families of Fe-based superconductors, and constitute a distinct new 245 family.
UR - http://www.scopus.com/inward/record.url?scp=80053114050&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.107.137003
DO - 10.1103/PhysRevLett.107.137003
M3 - Article
AN - SCOPUS:80053114050
SN - 0031-9007
VL - 107
JO - Physical Review Letters
JF - Physical Review Letters
IS - 13
M1 - 137003
ER -