TY - JOUR
T1 - Measurements of magnetic susceptibility of a genuine organic bulk-ferromagnet at high pressures in a diamond anvil cell
AU - Mito, M.
AU - Tanimoto, T.
AU - Kawae, T.
AU - Hitaka, M.
AU - Takeda, K.
AU - Nakatsuji, S.
AU - Morimoto, H.
AU - Anzai, H.
N1 - Funding Information:
This work was supported in part by a Grant-in-Aid for Scientific Research (A) (12305022), a Grant-in-Aid for Scientific Research (C) (1264558) and a Grant-in-Aid for Scientific Research on Priority Areas (B) of Molecular Conductors and Magnets (area no.730/11224206) from the Ministry of Education, Science, Sports and Culture, Japan.
PY - 2001/5/30
Y1 - 2001/5/30
N2 - We studied the effect of pressure P on a genuine organic bulk-ferromagnet, 2,5-difluorophenyl-α-nitronyl nitroxide (2,5-DF-PNN), in the region up to 9.2 GPa, by measuring the ac magnetic susceptibility Χac in a diamond anvil cell (DAC). The transition temperature Tc of 2,5-DFPNN at ambient pressure is 0.45 K. Tc is enhanced almost linearly against the pressure up to P ≤ 2.6 GPa, but that enhancement tends to saturate at P ≥ 2.6 GPa. Tc finally increases up to 1.36 K at P = 3.7 GPa. On the other hand, the magnitude of Χac is suppressed by the pressure, and the ferromagnetic signal finally disappears at P ≥ 4.6 GPa. We consider that the enhancement of Tc and the decrease of the magnitude of Χac are due to the increase of the two-dimensional ferromagnetic intermolecular interaction on a plane including the a-axis and the decrease of the ferromagnetic interaction along a third axis.
AB - We studied the effect of pressure P on a genuine organic bulk-ferromagnet, 2,5-difluorophenyl-α-nitronyl nitroxide (2,5-DF-PNN), in the region up to 9.2 GPa, by measuring the ac magnetic susceptibility Χac in a diamond anvil cell (DAC). The transition temperature Tc of 2,5-DFPNN at ambient pressure is 0.45 K. Tc is enhanced almost linearly against the pressure up to P ≤ 2.6 GPa, but that enhancement tends to saturate at P ≥ 2.6 GPa. Tc finally increases up to 1.36 K at P = 3.7 GPa. On the other hand, the magnitude of Χac is suppressed by the pressure, and the ferromagnetic signal finally disappears at P ≥ 4.6 GPa. We consider that the enhancement of Tc and the decrease of the magnitude of Χac are due to the increase of the two-dimensional ferromagnetic intermolecular interaction on a plane including the a-axis and the decrease of the ferromagnetic interaction along a third axis.
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U2 - 10.1016/S0277-5387(01)00643-X
DO - 10.1016/S0277-5387(01)00643-X
M3 - Article
AN - SCOPUS:0035972430
SN - 0277-5387
VL - 20
SP - 1505
EP - 1508
JO - Polyhedron
JF - Polyhedron
IS - 11-14
ER -