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Titolo:
High field phase transitions of quasi one-dimensional S = 1/2 Heisenberg antiferromagnet Cu-2(1,4-diazacycloheptane)(2)Cl-4 observed by submillimeterwave ESR
Autore:
Ohta, H; Tanaka, T; Okubo, S; Kimura, 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 Kobe Univ, Grad Sch Sci & Technol, Nada Ku, Kobe, Hyogo 6578501, Japan Kobe Univ Kobe Hyogo Japan 6578501 l, Nada Ku, Kobe, Hyogo 6578501, Japan Univ Tsukuba, Inst Phys, Tsukuba, Ibaraki 3058571, Japan Univ Tsukuba Tsukuba Ibaraki Japan 3058571 sukuba, Ibaraki 3058571, Japan
Titolo Testata:
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
fascicolo: 3, volume: 68, anno: 1999,
pagine: 732 - 735
SICI:
0031-9015(199903)68:3<732:HFPTOQ>2.0.ZU;2-Z
Fonte:
ISI
Lingua:
ENG
Soggetto:
PEIERLS MATERIAL CUGEO3; HALDANE-GAP; SPIN CHAIN; LADDER; SYSTEM; CU-2(C5H12N2)(2)CL-4; RELAXATION; COMPOUND;
Keywords:
millimeter wave ESR; submillimeter wave ESR; Cu-2(C5H12N2)(2)Cl-4; quantum spin chain; magnetic phase transition;
Tipo documento:
Letter
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
19
Recensione:
Indirizzi per estratti:
Indirizzo: Ohta, H KobeJapan, Fac Sci, Dept Phys, Nada Ku, 1-1 Rokkodai, Kobe, Hyogo 6578501, Kobe Univ 1-1 Rokkodai Kobe Hyogo Japan 6578501 be, Hyogo 6578501,
Citazione:
H. Ohta et al., "High field phase transitions of quasi one-dimensional S = 1/2 Heisenberg antiferromagnet Cu-2(1,4-diazacycloheptane)(2)Cl-4 observed by submillimeterwave ESR", J PHYS JPN, 68(3), 1999, pp. 732-735

Abstract

Millimeter and submillimeter wave ESR measurements on a single crystal of an S = 1/2 Heisenberg ladder-like system Cu-2(C5H12N2)(2)Cl-4 have been performed using a pulsed magnetic field up to 16T. The gap is estimated to be 9.7K from the temperature dependence of ESR intensity. The detailed frequency dependence of ESR in the frequency region from 40 to 420 GHz at 1.8K suggests magnetic transitions at H-c1 = 7.5T, H-c2 = 10.1T and H-s = 13.2T. A transition at 10.1T is suggested for the first time. These results are discussed with previous magnetization measurements and theoretical calculations, and our results appear to be difficult to interpret according to the simple ladder model.

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Documento generato il 04/12/20 alle ore 16:35:24