TY - JOUR
T1 - Pressure Induced Enhancement of Tc in Weak-Ferromagnetic Radical Crystal 1,3,5-Triphenyl-6-Oxoverdazyl
AU - Mito, Masaki
AU - Hitaka, Masako
AU - Kawae, Tatsuya
AU - Takeda, Kazuyoshi
AU - Suzuki, Kentaro
AU - Mukai, Kazuo
PY - 1999/1/1
Y1 - 1999/1/1
N2 - 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.
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.
UR - http://www.scopus.com/inward/record.url?scp=0042726808&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0042726808&partnerID=8YFLogxK
U2 - 10.1080/10587259908023334
DO - 10.1080/10587259908023334
M3 - Article
AN - SCOPUS:0042726808
SN - 1058-725X
VL - 334
SP - 369
EP - 378
JO - Molecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals
JF - Molecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals
ER -