Long-range magnetic order of the Er ions inEr2Ba4Cu7O14.92

Autor:	Peter M. Fischer, François Fauth, Pedro Berastegui, Yuji Aoki, Andreas Dönni, Hideyuki Sato, G. Bottger
Rok vydání:	1997
Předmět:	Superconductivity Range (particle radiation) Crystallography Materials science Condensed matter physics Magnetic order Neutron diffraction Antiferromagnetism Angstrom Crystallite Ion
Zdroj:	Physical Review B. 55:R12005-R12010
ISSN:	1095-3795 0163-1829
DOI:	10.1103/physrevb.55.r12005
Popis:	Neutron-diffraction investigations at temperatures down to 25 mK were performed for the high-temperature superconductor Er{sub 2}Ba{sub 4}Cu{sub 7}O{sub 14.92} (Er-247), T{sub c}=89 K on a polycrystalline sample prepared by a sol-gel technique. Below T{sub N}=0.54 K, a three-dimensional antiferromagnetic ordering of the Er ions corresponding to a propagation vector {bold k}=(1/2,0,0) and a finite correlation length of about 130 {Angstrom} along the c axis have been found. The magnetic Er moments are oriented parallel to the b axis. This work proves that Er-247 shows a long-range magnetic ordering. {copyright} {ital 1997} {ital The American Physical Society}
Databáze:	OpenAIRE
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