Thesis

### Phase transitions in spin-phonon systems

Abstract:

General symmetry arguments show that an elastic constant should vanish when a crystal undergoes a second order structural phase transition. A detailed theory of the elastic anomaly is developed for DyVO4, TbVO4, and TmVO4, which have crystallographic phase changes caused by the Jahn-Teller effect at 14, 34 and 2.1°K respectively. The theory predicts that the elastic constant ½(c11-c12

Peer review status:
Peer reviewed

Files:
• (pdf, 7.2MB)

### Authors

More by this author
Department:
University of Oxford
Role:
Author
Type of award:
DPhil
Level of award:
Doctoral
Awarding institution:
University of Oxford
Source identifiers:
601870403
UUID:
Local pid:
polonsky:7:7
Deposit date:
2017-10-05