KANG, WN KIM, DH PARK, JH HAHN, TS CHOI, SS GRAY, KE 2024-01-21T21:16:31Z 2024-01-21T21:16:31Z 2022-01-11 1994-11-20 0921-4534 https://pubs.kist.re.kr/handle/201004/145455 The temperature and magnetic-field dependence of 1/f noise from voltage fluctuations has been measured in epitaxial YBa2Cu3Ox films. In a magnetic field, two noise peaks were observed as temperature is reduced; one at higher temperature showed no magnetic-field dependence, while the peak near the zero-resistance transition temperature showed clear magnetic-field dependence. We show that the field-dependent noise is due to flux motion interacting with the pinning potential. A classical model is used to explain the flux-motion-induced noise peaks. The origin of the noise peaks is interpreted as due to the opposite temperature dependences of the flux-bundle size and the sample resistance. A rough estimate of the temperature and magnetic-field dependence of the flux-bundle size is presented. English ELSEVIER SCIENCE BV HIGH-TEMPERATURE SUPERCONDUCTORS FLUX-FLOW NOISE 1-F NOISE RESISTANCE FLUCTUATIONS RESISTIVE TRANSITION ORIGIN OF 1/F NOISE PEAKS OF YBA2CU3OX FILMS IN A MAGNETIC-FIELD Article 10.1016/0921-4534(94)90769-2 1 PHYSICA C, v.233, no.3-4, pp.402 - 408 PHYSICA C 233 3-4 402 408 scie scopus A1994PT74000023 2-s2.0-0028548605 Physics, Applied Physics, Condensed Matter Physics Article RESISTANCE FLUCTUATIONS RESISTIVE TRANSITION HIGH-TEMPERATURE SUPERCONDUCTORS FLUX-FLOW NOISE 1-F NOISE