TY - JOUR
T1 - Element-specific magnetic properties of Di-erbium Er2@C 82 and Er2C2@C82 metallofullerenes
T2 - A synchrotron soft X-ray magnetic circular dichroism study
AU - Okimoto, Haruya
AU - Kitaura, Ryo
AU - Nakamura, Tetsuya
AU - Ito, Yasuhiro
AU - Kitamura, Yutaka
AU - Akachi, Takao
AU - Ogawa, Daisuke
AU - Imazu, Naoki
AU - Kato, Yuko
AU - Asada, Yuki
AU - Sugai, Toshiki
AU - Osawa, Hitoshi
AU - Matsushita, Tomohiro
AU - Muro, Takayuki
AU - Shinohara, Hisanori
PY - 2008/4/17
Y1 - 2008/4/17
N2 - The magnetic properties of mono- and dierbium(Er) metallofullerenes have been studied by means of a synchrotron soft X-ray magnetic circular dichroism (SXMCD) technique. The effective magnetic moment of the Er ions has been estimated to be 8.48 μB and is independent of the number of Er ions encapsulated inside the fullerene cage. These Er metallofullerenes exhibit an antiferromagnetic-like behavior at low temperatures that is stronger in Er@C82(C2v isomer) monometallofullerene than in Er 2OC82(C2v and Er2C 2OC82(C2v,) dimetallofullerenes. The result suggests that the unpaired spin on the monometallofullerene cages causes an indirect magnetic interaction between Er 4f spins of neighboring metallofullerenes. Furthermore, we have found that the Weiss temperatures of the metallofullerene remain the same even when one of the Er ions in Er 2C2OC82(Cs) is replaced by a nonmagnetic Y ion (i.e., ErYC2@C82). The results indicate that interaction between the two Er ions in the same fullerene cage does not contribute significantly to the overall magnetic properties.
AB - The magnetic properties of mono- and dierbium(Er) metallofullerenes have been studied by means of a synchrotron soft X-ray magnetic circular dichroism (SXMCD) technique. The effective magnetic moment of the Er ions has been estimated to be 8.48 μB and is independent of the number of Er ions encapsulated inside the fullerene cage. These Er metallofullerenes exhibit an antiferromagnetic-like behavior at low temperatures that is stronger in Er@C82(C2v isomer) monometallofullerene than in Er 2OC82(C2v and Er2C 2OC82(C2v,) dimetallofullerenes. The result suggests that the unpaired spin on the monometallofullerene cages causes an indirect magnetic interaction between Er 4f spins of neighboring metallofullerenes. Furthermore, we have found that the Weiss temperatures of the metallofullerene remain the same even when one of the Er ions in Er 2C2OC82(Cs) is replaced by a nonmagnetic Y ion (i.e., ErYC2@C82). The results indicate that interaction between the two Er ions in the same fullerene cage does not contribute significantly to the overall magnetic properties.
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U2 - 10.1021/jp711776j
DO - 10.1021/jp711776j
M3 - Article
AN - SCOPUS:47149085836
SN - 1932-7447
VL - 112
SP - 6103
EP - 6109
JO - Journal of Physical Chemistry C
JF - Journal of Physical Chemistry C
IS - 15
ER -