TY - JOUR
T1 - Two gaps in \(VO\)2P2O7
T2 - Observation using high-field magnetization and NMR
AU - Yamauchi, T.
AU - Narumi, Y.
AU - Kikuchi, J.
AU - Ueda, Y.
AU - Tatani, K.
AU - Kobayashi, T. C.
AU - Kindo, K.
AU - Motoya, K.
PY - 1999/1/1
Y1 - 1999/1/1
N2 - The alternating one-dimensional Heisenberg S = 1/2 chain compound with spin gap, \(VO\)2P2O7, has been studied by the high-field magnetization and 31P NMR measurements. Two critical phenomena at 25+/-1 and 46+/-2 T are observed in the magnetization curve, which are considered to be a crossover between the ground state and the excited state in two kinds of gap systems. 31P NMR also revealed the coexistence of two magnetic systems with independent spin gaps. Results obtained from the present and previous studies are well explained by the model in which two kinds of magnetic chains along the b axis behave as alternating spin chains with independent gap energies.
AB - The alternating one-dimensional Heisenberg S = 1/2 chain compound with spin gap, \(VO\)2P2O7, has been studied by the high-field magnetization and 31P NMR measurements. Two critical phenomena at 25+/-1 and 46+/-2 T are observed in the magnetization curve, which are considered to be a crossover between the ground state and the excited state in two kinds of gap systems. 31P NMR also revealed the coexistence of two magnetic systems with independent spin gaps. Results obtained from the present and previous studies are well explained by the model in which two kinds of magnetic chains along the b axis behave as alternating spin chains with independent gap energies.
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U2 - 10.1103/PhysRevLett.83.3729
DO - 10.1103/PhysRevLett.83.3729
M3 - Article
AN - SCOPUS:0000844778
SN - 0031-9007
VL - 83
SP - 3729
EP - 3732
JO - Physical Review Letters
JF - Physical Review Letters
IS - 18
ER -