1887
banner image
No data available.
Please log in to see this content.
You have no subscription access to this content.
No metrics data to plot.
The attempt to load metrics for this article has failed.
The attempt to plot a graph for these metrics has failed.
Enthalpy and entropy of twin boundaries in superconducting
Rent:
Rent this article for
USD
10.1063/1.1999034
/content/aip/journal/jap/98/3/10.1063/1.1999034
http://aip.metastore.ingenta.com/content/aip/journal/jap/98/3/10.1063/1.1999034

Figures

Image of FIG. 1.
FIG. 1.

A schematic diagram showing a twin colony with a set of parallel twins. Only three twins are shown here. Usually, there are 10–20 twins. The coordinate along the twin length is , where at the twin middle or root and at the twin tips. The profile of a twin is . is the twin thickness.

Image of FIG. 2.
FIG. 2.

The twin spacing vs square root of domain size for sample 450.

Image of FIG. 3.
FIG. 3.

The twin spacing vs square root of domain size for sample 500.

Image of FIG. 4.
FIG. 4.

Temperature dependence of the twin boundary energy calculated by the twin spacing method.

Image of FIG. 5.
FIG. 5.

(a) TEM micrograph showing a set of twin tips in sample 600. (b) TEM micrograph showing a set of twin tips in sample 650 meeting the other twin variant with small obstacle separation, i.e., small ratio. (c) TEM micrograph showing a set of twin tips in sample 650 approaching the other twin variant with large ratio. (d) TEM micrograph showing a set of twin tips in sample 680 approaching the other twin variant with small ratio.

Image of FIG. 6.
FIG. 6.

Influence of ratio on the twin energy determination by the tip method for different oxygenation temperatures, (a) 600 °C and (b) 650 °C.

Image of FIG. 7.
FIG. 7.

A selected plot of twin thickness vs the reduced coordinate for the twin tip region in sample 450.

Image of FIG. 8.
FIG. 8.

A selected plot of twin thickness vs the reduced coordinate for the twin tip region in sample 500.

Image of FIG. 9.
FIG. 9.

Temperature dependence of the twin boundary energy obtained by the twin spacing method (a) and by the twin tip method (b). Slope corresponding to the entropy for twin boundary in MTG YBCO.

Tables

Generic image for table
Table I.

The reported twin boundary energies ’s in Y123.

Generic image for table
Table II.

Summary of the reported values of Young’s modulus , stiffness constants (’s), shear modulus , Poisson’s ratio of Y123, and the measuring methods used.

Generic image for table
Table III.

The influence of the distance from twin tip to the second twin variant on the twin boundary energy calculation for the samples annealed at 600 °C.

Generic image for table
Table IV.

The influence of the distance from twin tip to the second twin variant on the twin boundary energy calculation for the samples annealed at 650 °C.

Generic image for table
Table V.

Twin boundary energy of YBCO calculated by the twin tip method.

Generic image for table
Table VI.

Surface energies and twin boundary energies of selected materials.

Generic image for table
Table VII.

Comparison of reported for Y123 with the parameter used and annealing temperatures. For the normalized calculation (last column), the parameters used are and . NA means not available from the references.

Loading

Article metrics loading...

/content/aip/journal/jap/98/3/10.1063/1.1999034
2005-08-09
2014-04-20
Loading

Full text loading...

This is a required field
Please enter a valid email address
752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Enthalpy and entropy of twin boundaries in superconducting YBa2Cu3O7−x
http://aip.metastore.ingenta.com/content/aip/journal/jap/98/3/10.1063/1.1999034
10.1063/1.1999034
SEARCH_EXPAND_ITEM