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High resolution electron microscopy of Nb3Sn and its defects

✍ Scribed by Y. Kitano; H.U. Nissen; K. Kwasnitza

Book ID
103055023
Publisher
Elsevier Science
Year
1982
Tongue
English
Weight
702 KB
Volume
22
Category
Article
ISSN
0011-2275

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✦ Synopsis

Powdered samples of polycrystalline Nb3Sn superconductor filaments with cubic A 15~tructure have been investigated by high resolution electron microscopy (HREM). Structure images representing the projected electric potential of the structure in the (001)-plane are presented. The constrast pattern shows the position of the individual chains of Nb-atoms arranged parallel to the electron beam. This pattern is compared with the contrast calculated on the basis of the dynamical theory of electron diffraction by the multislice method. The observed contrast agrees with the calculated pattern. A structure image made in the [012]-projection containing one dislocation reveals a large region of strain in the crystal lattice surrounding that defect.

High resolution electron microscopy of Nb3Sn and its defects Y. Kitano, H.U. Nissen and K. Kwasnitza

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## Abstract By low‐temperature transmission electron microscopy we have found nanodomains in a polycrystalline Nb~3~Sn sample. We interpret that these nanodomains form due to a tetragonal distortion. Because twinning seems to be a prominent feature of the real structure of many high __T__~c~ superc