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Thermodynamic constraints from ultrasound measurements in UPt3

✍ Scribed by G.L. Bullock; B.S. Shivaran; D.G. Hinks


Publisher
Elsevier Science
Year
1993
Tongue
English
Weight
167 KB
Volume
186-188
Category
Article
ISSN
0921-4526

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The tetracritical point seen in the H-T phase diagram of UPt3 for several orientations of H strongly constrains Ginzburg-Landau (GL) theories, as the GL "Hamiltonian" must have a conserved quantity Q. A two-component vector order parameter model has a Q for HNc , but no tetracritical point. Among ac