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 language | English |
|---|---|
| Pages (from-to) | 499-508 |
| Number of pages | 10 |
| Journal | Molecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals |
| Volume | 305 |
| Publication status | Published - 1997 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Condensed Matter Physics
Cite this
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. / Mukai, Kazuo; Wada, Naoki; Jamali, Javad B.; Achiwa, Norio; Narumi, Yasuo; Kindo, Koichi; Kobayashi, Tatsuo; Amaya, Kiichi.
In: Molecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals, Vol. 305, 1997, p. 499-508.Research output: Contribution to journal › Article
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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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M3 - Article
AN - SCOPUS:0031341537
VL - 305
SP - 499
EP - 508
JO - Molecular Crystals and Liquid Crystals
JF - Molecular Crystals and Liquid Crystals
SN - 1542-1406
ER -