Title of article :
New organic ferromagnets: 4-arylmethyleneamino-2,2,6,6-tetramethylpiperidin-1-oxyl (aryl = phenyl, 4-biphenylyl, 4-chlorophenyl, and 4-phenoxyphenyl)
Author/Authors :
Nogami، نويسنده , , Takashi and Togashi، نويسنده , , Kensuke and Tsuboi، نويسنده , , Hidenori and Ishida، نويسنده , , Takayuki and Yoshikawa، نويسنده , , Hajime and Yasui، نويسنده , , Masanori and Iwasaki، نويسنده , , Fujiko and Iwamura، نويسنده , , Hiizu and Takeda، نويسنده , , Naoya and Ishikawa، نويسنده , , Masayasu، نويسنده ,
Abstract :
The title radicals were found to be bulk ferromagnets, as indicated by the sharp divergence of the susceptibility. Their transition temperatures were found in the range of 0.2–0.4 K. The X-ray crystal structure analysis of the phenyl, biphenylyl, and chlorophenyl derivatives at room temperature revealed that the crystal consisted of an almost two-dimensional network of the N-O sites. In the case of aryl = 2-naphthyl, metamagnetic behavior was observed below about 0.3 K.
