Magnetic properties of 1,5-dimethyl-6-oxoverdazyl radical crystals observation of a spin-peierls transition in 3-(4- cyanophenyl)-1,5-dimethyl-6-oxoverdazyl radical, p-CyDOV

Kazuo Mukai, Naoki Wada, Javad B. Jamali, Norio Achiwa, Yasuo Narumi, Koichi Kindo, Tatsuo Kobayashi, Kiichi Amaya

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Abstract

Magnetic susceptibilities of 5 kinds of 3-(4-R-phenyl)-1,5-dimethyl-6-oxoverdazyl radicals (PDOV (R=H), p-MDOV (R=CH3O), p-MeDOV (R=CH3), p-CyDOV (R=CN), and p-NDOV (R=NO2)) have been measured in the temperature range of 4.2-300 K. The susceptibilities of PDOV, p-MDOV, and p-MeDOV can be explained by an antiferromagnetic Heisenberg alternating chain model. The susceptibility of p-CyDOV shows a broad maximum at 54 K, and decreases abruptly at 15 K, suggesting a spin-Peierls transition. High-field magnetization data (H = 0 to 35 T) which provide a clear evidence for a spin-Peierls transition were reported The magnetic susceptibilities of diluted crystal, (p-CyDOV)1-x(p-CyDOV- H)x (x = 0 - 0.10), were measured to study the effects of nonmagnetic impurities, p-CyDOV-H (amine precursor of p-CyDOV), on the spin-Peierls transition. The transition temperature reduced rapidly upon p-CyDOV-H substitution and the spin-Peierls state disappeared around x = 0.07.

Original languageEnglish
Pages (from-to)499-508
Number of pages10
JournalMolecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals
Volume305
Publication statusPublished - 1997
Externally publishedYes

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Magnetic susceptibility
Magnetic properties
magnetic properties
magnetic permeability
Crystals
Superconducting transition temperature
crystals
Amines
Magnetization
Substitution reactions
Impurities
amines
transition temperature
substitutes
impurities
Temperature
magnetization
temperature

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

@article{c5d65837af824f4ab50b39355865a690,
title = "Magnetic properties of 1,5-dimethyl-6-oxoverdazyl radical crystals observation of a spin-peierls transition in 3-(4- cyanophenyl)-1,5-dimethyl-6-oxoverdazyl radical, p-CyDOV",
abstract = "Magnetic susceptibilities of 5 kinds of 3-(4-R-phenyl)-1,5-dimethyl-6-oxoverdazyl radicals (PDOV (R=H), p-MDOV (R=CH3O), p-MeDOV (R=CH3), p-CyDOV (R=CN), and p-NDOV (R=NO2)) have been measured in the temperature range of 4.2-300 K. The susceptibilities of PDOV, p-MDOV, and p-MeDOV can be explained by an antiferromagnetic Heisenberg alternating chain model. The susceptibility of p-CyDOV shows a broad maximum at 54 K, and decreases abruptly at 15 K, suggesting a spin-Peierls transition. High-field magnetization data (H = 0 to 35 T) which provide a clear evidence for a spin-Peierls transition were reported The magnetic susceptibilities of diluted crystal, (p-CyDOV)1-x(p-CyDOV- H)x (x = 0 - 0.10), were measured to study the effects of nonmagnetic impurities, p-CyDOV-H (amine precursor of p-CyDOV), on the spin-Peierls transition. The transition temperature reduced rapidly upon p-CyDOV-H substitution and the spin-Peierls state disappeared around x = 0.07.",
author = "Kazuo Mukai and Naoki Wada and Jamali, {Javad B.} and Norio Achiwa and Yasuo Narumi and Koichi Kindo and Tatsuo Kobayashi and Kiichi Amaya",
year = "1997",
language = "English",
volume = "305",
pages = "499--508",
journal = "Molecular Crystals and Liquid Crystals",
issn = "1542-1406",
publisher = "Taylor and Francis Ltd.",

}

TY - JOUR

T1 - Magnetic properties of 1,5-dimethyl-6-oxoverdazyl radical crystals observation of a spin-peierls transition in 3-(4- cyanophenyl)-1,5-dimethyl-6-oxoverdazyl radical, p-CyDOV

AU - Mukai, Kazuo

AU - Wada, Naoki

AU - Jamali, Javad B.

AU - Achiwa, Norio

AU - Narumi, Yasuo

AU - Kindo, Koichi

AU - Kobayashi, Tatsuo

AU - Amaya, Kiichi

PY - 1997

Y1 - 1997

N2 - Magnetic susceptibilities of 5 kinds of 3-(4-R-phenyl)-1,5-dimethyl-6-oxoverdazyl radicals (PDOV (R=H), p-MDOV (R=CH3O), p-MeDOV (R=CH3), p-CyDOV (R=CN), and p-NDOV (R=NO2)) have been measured in the temperature range of 4.2-300 K. The susceptibilities of PDOV, p-MDOV, and p-MeDOV can be explained by an antiferromagnetic Heisenberg alternating chain model. The susceptibility of p-CyDOV shows a broad maximum at 54 K, and decreases abruptly at 15 K, suggesting a spin-Peierls transition. High-field magnetization data (H = 0 to 35 T) which provide a clear evidence for a spin-Peierls transition were reported The magnetic susceptibilities of diluted crystal, (p-CyDOV)1-x(p-CyDOV- H)x (x = 0 - 0.10), were measured to study the effects of nonmagnetic impurities, p-CyDOV-H (amine precursor of p-CyDOV), on the spin-Peierls transition. The transition temperature reduced rapidly upon p-CyDOV-H substitution and the spin-Peierls state disappeared around x = 0.07.

AB - Magnetic susceptibilities of 5 kinds of 3-(4-R-phenyl)-1,5-dimethyl-6-oxoverdazyl radicals (PDOV (R=H), p-MDOV (R=CH3O), p-MeDOV (R=CH3), p-CyDOV (R=CN), and p-NDOV (R=NO2)) have been measured in the temperature range of 4.2-300 K. The susceptibilities of PDOV, p-MDOV, and p-MeDOV can be explained by an antiferromagnetic Heisenberg alternating chain model. The susceptibility of p-CyDOV shows a broad maximum at 54 K, and decreases abruptly at 15 K, suggesting a spin-Peierls transition. High-field magnetization data (H = 0 to 35 T) which provide a clear evidence for a spin-Peierls transition were reported The magnetic susceptibilities of diluted crystal, (p-CyDOV)1-x(p-CyDOV- H)x (x = 0 - 0.10), were measured to study the effects of nonmagnetic impurities, p-CyDOV-H (amine precursor of p-CyDOV), on the spin-Peierls transition. The transition temperature reduced rapidly upon p-CyDOV-H substitution and the spin-Peierls state disappeared around x = 0.07.

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