Experimental evidence for fast cluster formation of chain oxygen vacancies in YBa2Cu3O7−δ as the origin of the fishtail anomaly
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M ay 1 99 8 Experimental evidence for fast cluster formation of chain oxygen vacancies in YBa 2 Cu 3 O 7 − δ being at the origin of the fishtail anomaly
We report on three different and complementary measurements, namely magnetisation measurements positron annihilation spectroscopy and NMR measurements, which give evidence that the formation of oxygen vacancy clusters is on the origin of the fishtail anomaly in YBa2Cu3O7−δ. While in the case of YBa2Cu3O7.0 the anomaly is intrinsically absent, it can be suppressed in the optimally doped state wh...
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ژورنال
عنوان ژورنال: Solid State Communications
سال: 1999
ISSN: 0038-1098
DOI: 10.1016/s0038-1098(99)00347-6