Uniform mixing of antiferromagnetism and high-Tcsuperconductivity in multilayer copper oxidesBa2Can

Superexchange interaction and magnetic moment in antiferromagnetic high-Tc cuprate superconductors

“…Multilayered cuprates provide us with the opportunity to research the characteristics of the disorder-free CuO 2 plane. Site-selective 63 Cu-NMR studies on multilayered cuprates have revealed that square-type inner CuO 2 planes (IPs) exhibit homogeneous hole doping [20][21][22][23][24][25][26][27]. The IPs are located so far from the charge reservoir layers (CRLs), in which the disorder is introduced by the chemical substitution.…”

High-TcSuperconductivity withTc= 52 K under Antiferromagnetic Order in Five-Layered Cuprate Ba2Ca4Cu5O10(F,O)2withTN= 175 K:19F- and Cu-NMR Studies

“…31) The nominal composition of the sample used in this study is nearly Ba 2 Ca 4 Cu 5 O 10 F 2 , although it is difficult to precisely determine the actual fraction of F 1À and O 2À at apical sites. 32,33) Figure 1(a) illustrates the crystal structure of 0245F with two kinds of CuO 2 planes: outer planes (OPs) and inner ones (IPs). The superconducting transition temperature T c ¼ 52 K was uniquely determined by the onset of SC diamagnetism measured by a dc SQUID magnetometer.…”

A zero-field Cu-NMR study on antiferromagnetic ordered state in four-layered high-Tc superconductors BaShimizu1, Mukuda2, Kitaoka3 et al. 2010Physica C: Superconductivity and its ApplicationsSelf Cite0000View full textAdd to dashboardCite

“…The CuO 2 layers are classified into two inequivalent types: fivefold outer CuO 2 plane (OP) and fourfold inner plane (IP). Main features of multilayered compounds are that (i) the local carrier density ðN h Þ for the IP is smaller than that for the OP [1][2][3] and (ii) underdoped CuO 2 layers show the uniform coexistence of superconductivity (SC) and antiferromagnetism (AFM) [4,5]. The coexistence, or competition, of the two phases is one of the most interesting issues in cuprates, which has been discussed theoretically [6,7].…”