Anomalous temperature dependence of magnetic relaxation in YBa{sub 2}Cu{sub 2}O{sub 7-{delta}} oxygen-deficient single crystals
Journal Article
·
· Journal of Experimental and Theoretical Physics
- National Academy of Sciences of Ukraine, Usikov Institute of Radio Engineering and Electronics (Ukraine)
The dependence of the magnetization relaxation rate S = -d lnM/dlnt on temperature T is measured in YBa{sub 2}Cu{sub 3}O{sub 7} {sub -} {sub {delta}} samples with various oxygen concentrations. It is found that the S(T) curve changes qualitatively when oxygen deficit {delta} exceeds the threshold value {delta}{sub th} = 0.37. For {delta} < {delta}{sub th} (T{sub c} > 60 K, where T{sub c} is the superconducting transition temperature), function S(T) has the well-known peak at T/T{sub c} = 0.4. For {delta} > {delta}{sub th} (at T{sub c} < 51 K), this peak transforms into a plateau and a new sharp peak appears at T/T{sub c} = 0.1. The threshold value {delta}{sub th} of the oxygen deficit corresponds to the transition of the sample from the disordered state into the ordered state of oxygen vacancies. We consider the change in the shape of the S(T) curve as a macroscopic manifestation of this transition.
- OSTI ID:
- 21246934
- Journal Information:
- Journal of Experimental and Theoretical Physics, Journal Name: Journal of Experimental and Theoretical Physics Journal Issue: 3 Vol. 108; ISSN JTPHES; ISSN 1063-7761
- Country of Publication:
- United States
- Language:
- English
Similar Records
Superconducting properties of oxygen deficient YBa/sub 2/Cu/sub 3/O/sub 7-delta/
Upper-critical fields of YBa[sub 2]Cu[sub 3]O[sub 7[minus][delta]] epitaxial thin films with variable oxygen deficiency [delta]
Structural properties of oxygen-deficient YBa sub 2 Cu sub 3 O sub 7 minus. delta
Conference
·
Sun Jan 31 23:00:00 EST 1988
·
OSTI ID:7257312
Upper-critical fields of YBa[sub 2]Cu[sub 3]O[sub 7[minus][delta]] epitaxial thin films with variable oxygen deficiency [delta]
Journal Article
·
Fri Dec 31 23:00:00 EST 1993
· Physical Review, B: Condensed Matter; (United States)
·
OSTI ID:5335099
Structural properties of oxygen-deficient YBa sub 2 Cu sub 3 O sub 7 minus. delta
Journal Article
·
Wed Jan 31 23:00:00 EST 1990
· Physical Review, B: Condensed Matter; (USA)
·
OSTI ID:7009242