Thermodynamics of Rh nuclear spins calculated by exact diagonalization

Research output: Contribution to journalJournal articleResearch

K. Lefmann, J. Ipsen, F.B. Rasmussen, Finn Berg Rasmussen

We have employed the method of exact diagonalization to obtain the full-energy spectrum of a cluster of 16 Rh nuclear spins, having dipolar and RK interactions between first and second nearest neighbours only. We have used this to calculate the nuclear spin entropy, and our results at both positive and negative temperatures follow the second-order high-temperature series expansions for |T| > 3 nK. Our findings do not agree with the measurements of the former Rh experiment in Helsinki, where a deviation is seen at much higher temperatures.
Original languageEnglish
JournalPhysica B: Condensed Matter
Volume284-288
Issue numberPART II
Pages (from-to)1702-1703
Number of pages2
ISSN0921-4526
Publication statusPublished - 1 Jan 2000

ID: 94533425