Spin relaxation and magnetic susceptibility studies of HMTSF-TCNQ

G. Soda; D. Jérome; M. Weger; K. Bechgaard; E. Pedersen

doi:10.1016/0038-1098(76)90464-6

Spin relaxation and magnetic susceptibility studies of HMTSF-TCNQ

G. Soda^*, D. Jérome, M. Weger, K. Bechgaard, E. Pedersen

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

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Abstract

The temperature and frequency dependence of the proton spin-lattice relaxation time T₁, and the temperature dependence of the magnetic susceptibility of HMTSF-TCNQ are reported. The relaxation rate T₁ ^-1 is slow and only slightly enhanced over the Korringa value. It is frequency-independent (in contrast with TTF-TCNQ), indicating a stronger interchain coupling. The susceptibility is weakly paramagnetic above 100 K, suggesting (together with the T₁ data) an effective mass m^* ≅ 2m_e in this temperature range. Below 100 K, χ becomes diamagnetic, saturating at 30 K. This diamagnetism is characterised as Landau-Peierls (orbital) diamagnetism, due to a more 3-dimensional character of the electronic states of HMTSF-TCNQ as the temperature is lowered from 100 K to 30 K.

Original language	English
Pages (from-to)	107-113
Number of pages	7
Journal	Solid State Communications
Volume	20
Issue number	2
DOIs	https://doi.org/10.1016/0038-1098(76)90464-6
State	Published - Oct 1976
Externally published	Yes

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title = "Spin relaxation and magnetic susceptibility studies of HMTSF-TCNQ",

abstract = "The temperature and frequency dependence of the proton spin-lattice relaxation time T1, and the temperature dependence of the magnetic susceptibility of HMTSF-TCNQ are reported. The relaxation rate T1 -1 is slow and only slightly enhanced over the Korringa value. It is frequency-independent (in contrast with TTF-TCNQ), indicating a stronger interchain coupling. The susceptibility is weakly paramagnetic above 100 K, suggesting (together with the T1 data) an effective mass m* ≅ 2me in this temperature range. Below 100 K, χ becomes diamagnetic, saturating at 30 K. This diamagnetism is characterised as Landau-Peierls (orbital) diamagnetism, due to a more 3-dimensional character of the electronic states of HMTSF-TCNQ as the temperature is lowered from 100 K to 30 K.",

author = "G. Soda and D. J{\'e}rome and M. Weger and K. Bechgaard and E. Pedersen",

year = "1976",

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doi = "10.1016/0038-1098(76)90464-6",

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T1 - Spin relaxation and magnetic susceptibility studies of HMTSF-TCNQ

AU - Soda, G.

AU - Jérome, D.

AU - Weger, M.

AU - Bechgaard, K.

AU - Pedersen, E.

PY - 1976/10

Y1 - 1976/10

N2 - The temperature and frequency dependence of the proton spin-lattice relaxation time T1, and the temperature dependence of the magnetic susceptibility of HMTSF-TCNQ are reported. The relaxation rate T1 -1 is slow and only slightly enhanced over the Korringa value. It is frequency-independent (in contrast with TTF-TCNQ), indicating a stronger interchain coupling. The susceptibility is weakly paramagnetic above 100 K, suggesting (together with the T1 data) an effective mass m* ≅ 2me in this temperature range. Below 100 K, χ becomes diamagnetic, saturating at 30 K. This diamagnetism is characterised as Landau-Peierls (orbital) diamagnetism, due to a more 3-dimensional character of the electronic states of HMTSF-TCNQ as the temperature is lowered from 100 K to 30 K.

AB - The temperature and frequency dependence of the proton spin-lattice relaxation time T1, and the temperature dependence of the magnetic susceptibility of HMTSF-TCNQ are reported. The relaxation rate T1 -1 is slow and only slightly enhanced over the Korringa value. It is frequency-independent (in contrast with TTF-TCNQ), indicating a stronger interchain coupling. The susceptibility is weakly paramagnetic above 100 K, suggesting (together with the T1 data) an effective mass m* ≅ 2me in this temperature range. Below 100 K, χ becomes diamagnetic, saturating at 30 K. This diamagnetism is characterised as Landau-Peierls (orbital) diamagnetism, due to a more 3-dimensional character of the electronic states of HMTSF-TCNQ as the temperature is lowered from 100 K to 30 K.

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JO - Solid State Communications

JF - Solid State Communications

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Spin relaxation and magnetic susceptibility studies of HMTSF-TCNQ

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