Zero-field muon spin rotation study on genuine organic ferromagnets, 4-arylmethyleneamino-2,2,6,6-tetramethylpiperidin-1-yloxyls (aryl=4-biphenylyl and phenyl)

Ishida T; Ohira S; Ise T; Nakayama K; Watanabe I; Nogami T; Nagamine K

Chemical Physics Letters, Vol.330, No.1-2, 110-117, 2000

DOI10.1016/S0009-2614(00)01065-4 Export Citation

Zero-field muon spin rotation study on genuine organic ferromagnets, 4-arylmethyleneamino-2,2,6,6-tetramethylpiperidin-1-yloxyls (aryl=4-biphenylyl and phenyl)

Ishida T, Ohira S, Ise T, Nakayama K, Watanabe I, Nogami T, Nagamine K

Long-range magnetic orderings are unequivocally demonstrated by zero-field muon spin rotation/relaxation measurements on the genuine organic free radical crystals of 4-(p-phenylbenzylideneamino)- and 4-(benzylideneamino)-TEMPOs (TEMPO = 2,2,6,6-tetramethylpiperidin-1-yloxyl). The T-C's are 0.22 and 0.17 K and the critical exponents (beta 's) 0.356 and 0.362, respectively. Dominant two-dimensional ferromagnetic interaction is confirmed and inter-sheet dipolar interaction is proposed for bulk ferromagnetism.