Controlling intermolecular spin interactions of La@C(82) in empty fullerene matrices.
The ESR properties and crystal structures of solid-state La@C(82) in empty fullerene matrices were investigated by changing the concentration of La@C(82) and the species of an empty fullerene matrix: C(60), C(70), C(78)(C(2v)(3)), C(82)(C(2)) and C(84)(D(2d)(4)). The rotational correlation time of La@C(82) molecules tended to be shorter when La@C(82) is dispersed in larger fullerene matrices because large C(2n) molecules provide more space for La@C(82) molecules for rotating. La@C(82) dispersed in a hcp-C(82) matrix showed the narrowest hyperfine structure (hfs) due to the ordered nature of La@C(82) molecules in the C(82) crystal. On the other hand, in a C(60) matrix, La@C(82) molecules formed clusters because of the large different solubility, which leads to the ESR spectra being broad sloping features due to strong dipole-dipole and exchange interactions.
Ito
Yasuhiro
Y
Department of Materials, Quantum Information Processing Interdisciplinary Research Collaboration (QIP IRC), University of Oxford, Parks Rd, Oxford, UKOX1 3PH. yasuhiro.ito@materials.ox.ac.uk
Warner
Jamie H
JH
Brown
Richard
R
Zaka
Mujtaba
M
Pfeiffer
Rudolf
R
Aono
Takayuki
T
Izumi
Noriko
N
Okimoto
Haruya
H
Morton
John J L
JJ
Ardavan
Arzhang
A
Shinohara
Hisanori
H
Kuzmany
Hans
H
Peterlik
Herwig
H
Briggs
G Andrew D
GA