Pressure Induced Enhancement of Tc in Weak-Ferromagnetic Radical Crystal 1,3,5-Triphenyl-6-Oxoverdazyl

Masaki Mito, Masako Hitaka, Tatsuya Kawae, Kazuyoshi Takeda, Kentaro Suzuki, Kazuo Mukai

Research output: Contribution to journalArticle

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Abstract

Study of pressure effect of organic weak-ferromagnet 1,3,5-triphenyl-6-oxoverdazyl (TOV) with the transition temperature Tc(P0) = 5.0 K (P0; ambient pressure) has been motivated by the experimental finding that slight dilution of TOV with the non-magnetic derivative changed the Weiss temperature (Θ) from negative to positive, i.e. from antiferromagnetic (AF) to ferromagnetic (F). We understood that above change of Θ would originate from the slight change of the crystal structure by an internal stress. Expecting the pressurization would bring about the same result as the dilution effect, we measured the ac magnetic susceptibility of pure TOV under the pressure up to P = 10.9 kbar. The pressure effect of pure TOV, however, revealed no transition from AF to F, but did the enhancement of TC(P). The pressure dependence of TC(P) is characterized with Tc(P) = Tc(P0) (1 + 0.086 P), and Tc(P) exceeds 10.0 K at P = 10.9 kbar.

Original languageEnglish
Pages (from-to)369-378
Number of pages10
JournalMolecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals
Volume334
DOIs
Publication statusPublished - Jan 1 1999

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pressure effects
dilution
Pressure effects
Crystals
Dilution
augmentation
pressure dependence
residual stress
crystals
Pressurization
transition temperature
Magnetic susceptibility
magnetic permeability
Superconducting transition temperature
crystal structure
Residual stresses
Crystal structure
Derivatives
temperature
Temperature

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

Cite this

Pressure Induced Enhancement of Tc in Weak-Ferromagnetic Radical Crystal 1,3,5-Triphenyl-6-Oxoverdazyl. / Mito, Masaki; Hitaka, Masako; Kawae, Tatsuya; Takeda, Kazuyoshi; Suzuki, Kentaro; Mukai, Kazuo.

In: Molecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals, Vol. 334, 01.01.1999, p. 369-378.

Research output: Contribution to journalArticle

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AU - Suzuki, Kentaro

AU - Mukai, Kazuo

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AB - Study of pressure effect of organic weak-ferromagnet 1,3,5-triphenyl-6-oxoverdazyl (TOV) with the transition temperature Tc(P0) = 5.0 K (P0; ambient pressure) has been motivated by the experimental finding that slight dilution of TOV with the non-magnetic derivative changed the Weiss temperature (Θ) from negative to positive, i.e. from antiferromagnetic (AF) to ferromagnetic (F). We understood that above change of Θ would originate from the slight change of the crystal structure by an internal stress. Expecting the pressurization would bring about the same result as the dilution effect, we measured the ac magnetic susceptibility of pure TOV under the pressure up to P = 10.9 kbar. The pressure effect of pure TOV, however, revealed no transition from AF to F, but did the enhancement of TC(P). The pressure dependence of TC(P) is characterized with Tc(P) = Tc(P0) (1 + 0.086 P), and Tc(P) exceeds 10.0 K at P = 10.9 kbar.

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