$^1$H-NMR Study of the Random Bond Effect in the Quantum Spin System (CH$_3$)$_2$CHNH$_3$Cu(Cl$_x$Br$_{1-x}$)$_3$

T. Adachi; K. Kanada; T. Saito; A. Oosawa; T. Goto

doi:10.1143/JPSJ.76.083701

paper

$^{1}$ H-NMR Study of the Random Bond Effect in the Quantum Spin System (CH $_{3}$ ) $_{2}$ CHNH $_{3}$ Cu(Cl $_{x}$ Br $_{1 - x}$ ) $_{3}$

arXiv:0706.0766 · doi:10.1143/JPSJ.76.083701

Abstract

Spin-lattice relaxation rate $T_{1}^{- 1}$ of $^{1}$ H-NMR has been measured in (CH $_{3}$ ) $_{2}$ CHNH $_{3}$ Cu(Cl $_{x}$ Br $_{1 - x}$ ) $_{3}$ with $x = 0.88$ , which has been reported to be gapped system with singlet ground state from the previous macroscopic magnetization and specific heat measurements, in order to investigate the bond randomness effect microscopically in the gapped composite Haldane system (CH $_{3}$ ) $_{2}$ CHNH $_{3}$ CuCl $_{3}$ . It was found that the spin-lattice relaxation rate $T_{1}^{- 1}$ in the present system includes both fast and slow relaxation parts indicative of the gapless magnetic ground state and the gapped singlet ground state, respectively. We discuss the obtained results with the previous macroscopic magnetization and specific heat measurements together with the microscopic $μ$ SR experiments.

arXiv comment4 pages, 2 figures, to be published in J. Phys. Soc. Jpn. vol.76 (2007) No.8

$^{1}$ H-NMR Study of the Random Bond Effect in the Quantum Spin System (CH $_{3}$ ) $_{2}$ CHNH $_{3}$ Cu(Cl $_{x}$ Br $_{1 - x}$ ) $_{3}$

Abstract

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1H-NMR Study of the Random Bond Effect in the Quantum Spin System (CH3​)2​CHNH3​Cu(Clx​Br1−x​)3​

Abstract

References in corpus (8)

Cited by in corpus (2)

$^{1}$ H-NMR Study of the Random Bond Effect in the Quantum Spin System (CH $_{3}$ ) $_{2}$ CHNH $_{3}$ Cu(Cl $_{x}$ Br $_{1 - x}$ ) $_{3}$