Journal
PHYSICAL REVIEW LETTERS
Volume 96, Issue 8, Pages -Publisher
AMERICAN PHYSICAL SOC
DOI: 10.1103/PhysRevLett.96.087001
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We report a site selective Cu-NMR study on underdoped Hg-based five-layered high-T-c cuprate HgBa2Ca4Cu5O12+delta with a T-c=72 K. Antiferromagnetism (AFM) has been found to take place at T-N=290 K, exhibiting a large antiferromagnetic moment of 0.67-0.69 mu(B) at three inner planes (IP). This value is comparable to the values reported for nondoped cuprates, suggesting that the IP may be in a nearly nondoped regime. Most surprisingly, the AFM order is also detected with M-AFM(OP)=0.1 mu(B) even at two outer planes (OP) that are responsible for the onset of superconductivity (SC). The high-T-c SC at T-c=72 K can uniformly coexist on a microscopic level with the AFM at OP's. This is the first microscopic evidence for the uniform mixed phase of AFM and SC on a single CuO2 plane in a simple environment without any vortex lattice and/or stripe order.
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