Thermodynamics of Rh nuclear spins calculated by exact diagonalization

TY - JOUR

T1 - Thermodynamics of Rh nuclear spins calculated by exact diagonalization

AU - Lefmann, K.

AU - Ipsen, J.

AU - Rasmussen, F.B.

AU - Rasmussen, Finn Berg

PY - 2000/1/1

Y1 - 2000/1/1

N2 - 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.

AB - 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.

KW - Faculty of Science

KW - magnetism

UR - http://www.scopus.com/inward/record.url?scp=0033689880&partnerID=8YFLogxK

M3 - Journal article

AN - SCOPUS:0033689880

SN - 0921-4526

VL - 284-288

SP - 1702

EP - 1703

JO - Physica B: Condensed Matter

JF - Physica B: Condensed Matter

IS - PART II

ER -