Surface-quality dependence of the low temperature magnetisation of YBa2Cu3O7

C  Panagopoulos; W  Zhou; N  Athanassopoulou; J R  Cooper

doi:10.1016/0921-4534(96)00449-2

Surface-quality dependence of the low temperature magnetisation of YBa2Cu3O7

C Panagopoulos, W Zhou, N Athanassopoulou, J R Cooper

Research output: Contribution to journal › Article › peer-review

Abstract

The effect of the surface structure and chemistry of YBa2Cu3O7 on the low temperature (T) low field susceptibility (chi) measurements was studied. Grinding sintered material in air into particles of average radius 5 mu m caused a small upturn in chi below 12 K and a larger effect was observed for smaller particles. These upturns could be removed by a suitable annealing treatment and a linear T dependence in chi, and consequently in the magnetic penetration depth was then observed. High resolution electron microscopy was used to monitor the corresponding changes in the surface structure of the particles.

Original language	English
Pages (from-to)	157-162
Number of pages	6
Journal	Physica C: Superconductivity
Volume	269
Issue number	1-2
DOIs	https://doi.org/10.1016/0921-4534(96)00449-2
Publication status	Published - 20 Sept 1996

Keywords

magnetisation
penetration depth
HREM
d-wave superconductor
RESOLUTION ELECTRON-MICROSCOPY
GRAIN-BOUNDARIES
BA2YCU3O7-X
CHEMISTRY

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10.1016/0921-4534(96)00449-2

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title = "Surface-quality dependence of the low temperature magnetisation of YBa2Cu3O7",

abstract = "The effect of the surface structure and chemistry of YBa2Cu3O7 on the low temperature (T) low field susceptibility (chi) measurements was studied. Grinding sintered material in air into particles of average radius 5 mu m caused a small upturn in chi below 12 K and a larger effect was observed for smaller particles. These upturns could be removed by a suitable annealing treatment and a linear T dependence in chi, and consequently in the magnetic penetration depth was then observed. High resolution electron microscopy was used to monitor the corresponding changes in the surface structure of the particles.",

keywords = "magnetisation, penetration depth, HREM, d-wave superconductor, RESOLUTION ELECTRON-MICROSCOPY, GRAIN-BOUNDARIES, BA2YCU3O7-X, CHEMISTRY",

author = "C Panagopoulos and W Zhou and N Athanassopoulou and Cooper, {J R}",

year = "1996",

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doi = "10.1016/0921-4534(96)00449-2",

language = "English",

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pages = "157--162",

journal = "Physica C: Superconductivity",

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T1 - Surface-quality dependence of the low temperature magnetisation of YBa2Cu3O7

AU - Panagopoulos, C

AU - Zhou, W

AU - Athanassopoulou, N

AU - Cooper, J R

PY - 1996/9/20

Y1 - 1996/9/20

N2 - The effect of the surface structure and chemistry of YBa2Cu3O7 on the low temperature (T) low field susceptibility (chi) measurements was studied. Grinding sintered material in air into particles of average radius 5 mu m caused a small upturn in chi below 12 K and a larger effect was observed for smaller particles. These upturns could be removed by a suitable annealing treatment and a linear T dependence in chi, and consequently in the magnetic penetration depth was then observed. High resolution electron microscopy was used to monitor the corresponding changes in the surface structure of the particles.

AB - The effect of the surface structure and chemistry of YBa2Cu3O7 on the low temperature (T) low field susceptibility (chi) measurements was studied. Grinding sintered material in air into particles of average radius 5 mu m caused a small upturn in chi below 12 K and a larger effect was observed for smaller particles. These upturns could be removed by a suitable annealing treatment and a linear T dependence in chi, and consequently in the magnetic penetration depth was then observed. High resolution electron microscopy was used to monitor the corresponding changes in the surface structure of the particles.

KW - magnetisation

KW - penetration depth

KW - HREM

KW - d-wave superconductor

KW - RESOLUTION ELECTRON-MICROSCOPY

KW - GRAIN-BOUNDARIES

KW - BA2YCU3O7-X

KW - CHEMISTRY

U2 - 10.1016/0921-4534(96)00449-2

DO - 10.1016/0921-4534(96)00449-2

M3 - Article

SN - 0921-4534

VL - 269

SP - 157

EP - 162

JO - Physica C: Superconductivity

JF - Physica C: Superconductivity

IS - 1-2

ER -

Surface-quality dependence of the low temperature magnetisation of YBa2Cu3O7

Abstract

Keywords

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