TY - JOUR
T1 - Static properties of an easy-plane ferromagnetic S=1/2 chain
T2 - Comparison of numerical results and experimental data on [C6H11NH3]CuBr3
AU - Kopinga, K.
AU - Delica, T.
AU - Leschke, H.
PY - 1989/1/1
Y1 - 1989/1/1
N2 - New results of a variant of the numerically exact transfer matrix method have been compared with the experimentally determined static properties of [C6H11NH3]CuBr3 (CHAB). Above T=3.5 K, the available data on the zero-field heat capacity, the excess heat capacity C=C(B) -C(B=0) for B=1, 2, and 3 T, and the magnetization up to 5 T are described with an accuracy that is comparable to the experimental error. Calculations of the spin-spin correlation functions by this method reveal that the fair description of the experimental correlation length in CHAB by a classical spin model is largely accidental. The zero-field susceptibility deduced from these correlation functions is in satisfactory agreement with the reported data.
AB - New results of a variant of the numerically exact transfer matrix method have been compared with the experimentally determined static properties of [C6H11NH3]CuBr3 (CHAB). Above T=3.5 K, the available data on the zero-field heat capacity, the excess heat capacity C=C(B) -C(B=0) for B=1, 2, and 3 T, and the magnetization up to 5 T are described with an accuracy that is comparable to the experimental error. Calculations of the spin-spin correlation functions by this method reveal that the fair description of the experimental correlation length in CHAB by a classical spin model is largely accidental. The zero-field susceptibility deduced from these correlation functions is in satisfactory agreement with the reported data.
UR - http://www.scopus.com/inward/record.url?scp=5844344653&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.40.7239
DO - 10.1103/PhysRevB.40.7239
M3 - Article
AN - SCOPUS:5844344653
VL - 40
SP - 7239
EP - 7246
JO - Physical Review B: Condensed Matter
JF - Physical Review B: Condensed Matter
SN - 0163-1829
IS - 10
ER -