TY - JOUR
T1 - Coexistence of Spin–Lattice Relaxation and Phonon-Bottleneck Processes in GdIII–Phthlocyaninato Triple-Decker Complexes under Highly Diluted Conditions
AU - Horii, Yoji
AU - Katoh, Keiichi
AU - Miyazaki, Yuji
AU - Damjanović, Marko
AU - Sato, Tetsu
AU - Ungur, Liviu
AU - Chibotaru, Liviu F.
AU - Breedlove, Brian K.
AU - Nakano, Motohiro
AU - Wernsdorfer, Wolfgang
AU - Yamashita, Masahiro
PY - 2020/6/26
Y1 - 2020/6/26
N2 - Gd3+ complexes have been shown to undergo unusual slow magnetic relaxation processes similar to those of single-molecule magnets (SMMs), even though Gd3+ does not exhibit strong magnetic anisotropy. To reveal the origin of the slow magnetic relaxation of Gd3+ complexes, we have investigated the magnetic properties and heat capacities of two Gd3+-phthalocyaninato triple-decker complexes, one of which has intramolecular Gd3+–Gd3+ interactions and the other does not. It was found that the Gd3+–Gd3+ interactions accelerate the magnetic relaxation processes. In addition, magnetically diluted samples, prepared by doping a small amount of the Gd3+ complexes into a large amount of diamagnetic Y3+ complexes, underwent dual magnetic relaxation processes. A detailed dynamic magnetic analysis revealed that the coexistence of spin–lattice relaxation and phonon-bottleneck processes is the origin of the dual magnetic relaxation processes.
AB - Gd3+ complexes have been shown to undergo unusual slow magnetic relaxation processes similar to those of single-molecule magnets (SMMs), even though Gd3+ does not exhibit strong magnetic anisotropy. To reveal the origin of the slow magnetic relaxation of Gd3+ complexes, we have investigated the magnetic properties and heat capacities of two Gd3+-phthalocyaninato triple-decker complexes, one of which has intramolecular Gd3+–Gd3+ interactions and the other does not. It was found that the Gd3+–Gd3+ interactions accelerate the magnetic relaxation processes. In addition, magnetically diluted samples, prepared by doping a small amount of the Gd3+ complexes into a large amount of diamagnetic Y3+ complexes, underwent dual magnetic relaxation processes. A detailed dynamic magnetic analysis revealed that the coexistence of spin–lattice relaxation and phonon-bottleneck processes is the origin of the dual magnetic relaxation processes.
KW - gadolinium
KW - magnetic properties
KW - phonon-bottleneck effect
KW - porphyrinoids
KW - spin–lattice relaxation
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U2 - 10.1002/chem.201905796
DO - 10.1002/chem.201905796
M3 - Article
C2 - 32057140
AN - SCOPUS:85085963721
VL - 26
SP - 8076
EP - 8082
JO - Chemistry - A European Journal
JF - Chemistry - A European Journal
SN - 0947-6539
IS - 36
ER -