12,000

We have over 12,000 students, from over 100 countries, within one of the safest campuses in the UK

93%

93% of Lancaster students go into work or further study within six months of graduating

Home > Research > Publications & Outputs > The formation and melting of He-3 clusters in p...
View graph of relations

« Back

The formation and melting of He-3 clusters in phase-separated solid He-3-He-4 mixtures.

Research output: Contribution to journalJournal article

Published

Journal publication date01/1998
JournalJournal of Low Temperature Physics
Journal number1-2
Volume110
Number of pages6
Pages121-126
Original languageEnglish

Abstract

Melting pressure measurements have been made on the He-3-rich phase formed by cooling a solid mixture of 0.6% He-3 in He-4 through phase separation, at pressures between 2.78 and 3.56 MPa. For comparison, simultaneous observations were made with the mixture confined in the pores of a silver sinter and in an open volume connected to the same fill-line. Samples in the sinter cell solidify at higher pressures than the open cell and equilibrate more quickly. Both cells exhibit hysteresis between melting and freezing temperatures, and the transitions are broader in the open-volume cell. Relative to pure He-3, the melting pressure is elevated by as much as 60 kPa in the sinter cell and 20 kPa in the open cell. The size of the pressure change on melting indicates that a large fraction of the He-3 remains solid at pressures below the melting curve, and this effect is more pronounced in the sinter cell. Measurements are in progress to measure the magnetisation through the magnetic ordering transition.