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Titolo:
High-field ESR measurements of a bond alternating Heisenberg chain system Ni-2(mu-N-3)(3)(dpt)(2)(ClO4)
Autore:
Ohta, H; Okubo, S; Kimura, S; Takeda, S; Kikuchi, H; Nagasawa, H;
Indirizzi:
Kobe Univ, Fac Sci, Dept Phys, Nada Ku, Kobe, Hyogo 6578501, Japan Kobe Univ Kobe Hyogo Japan 6578501 s, Nada Ku, Kobe, Hyogo 6578501, Japan Kobe Univ, Venture Business Lab, Nada Ku, Kobe, Hyogo 6578501, Japan Kobe Univ Kobe Hyogo Japan 6578501 b, Nada Ku, Kobe, Hyogo 6578501, Japan Fukui Univ, Fac Engn, Dept Appl Phys, Fukui 9108507, Japan Fukui Univ Fukui Japan 9108507 ngn, Dept Appl Phys, Fukui 9108507, Japan Univ Tsukuba, Inst Phys, Tsukuba, Ibaraki 305, Japan Univ Tsukuba TsukubaIbaraki Japan 305 Phys, Tsukuba, Ibaraki 305, Japan
Titolo Testata:
PHYSICA B
, volume: 294, anno: 2001,
pagine: 55 - 59
SICI:
0921-4526(200101)294:<55:HEMOAB>2.0.ZU;2-C
Fonte:
ISI
Lingua:
ENG
Soggetto:
SUBMILLIMETER-WAVE ESR; QUANTUM SPIN CHAINS; HALDANE-GAP; MAGNETIZATION; STATE;
Keywords:
quantum spin system; bond alternation; high-frequency ESR; pulsed magnetic field; spin gap;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
24
Recensione:
Indirizzi per estratti:
Indirizzo: Ohta, H Kobe Univ, Fac Sci, Dept Phys, Nada Ku, 1-1 Rokkodai, Kobe, Hyogo 6578501,Japan Kobe Univ 1-1 Rokkodai Kobe Hyogo Japan 6578501 yogo 6578501,Japan
Citazione:
H. Ohta et al., "High-field ESR measurements of a bond alternating Heisenberg chain system Ni-2(mu-N-3)(3)(dpt)(2)(ClO4)", PHYSICA B, 294, 2001, pp. 55-59

Abstract

High-field electron spin resonance has been measured on a Ni-2(mu -N-3)(3)(dpt)(2)(ClO4) single crystal, which is an S = 1 Heisenberg antiferromagnetwith bond alternation, in the frequency region from 50 to 370 GHz using pulsed magnetic fields up to 16 T. The g-values for H perpendicular and parallel to the single-crystal plane were determined to be 2.19 and 2.13, respectively. By analysing our results on frequency dependence at 20 K by the simple dimer model considering the singlet and triplet states, we were able todetermine the single-ion anisotropy of the system as /D/ = 10.6 K and /E/ = 3.1 K for the first time. The spin gap was estimated to be 93 K from the analysis of the temperature dependence of the integrated intensity. These results will be discussed in connection with other S = 1 Heisenberg antiferromagnets with bond alternation. (C) 2001 Elsevier Science B.V. All rights reserved.

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Documento generato il 27/11/20 alle ore 03:42:52