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
N1 - Funding Information:
This work was financially supported by the JSPS KAKENHI (Grant nos. JP20225003, JP15K05467, JP24750119, JP14J02656, JP17K19102, and JP18K14242), Tohoku University Molecule and Material Synthesis Platform in the Nanotechnology Platform Project, and CREST, JST (Grant No. JPMJCR12L3). M.Y. thanks the support by the 111 project (B18030) of China. We thank Dr. Y. Nakano for ICP‐AES measurements. The scientific grants R‐143‐000‐A80‐114 and R‐143‐ 000‐A65‐133 from the National University of Singapore are gratefully acknowledged. Computational resources from NSCC are gratefully acknowledged. This paper is Contribution No. 61 from the Research Center for Thermal and Entropic Science.
Funding Information:
This work was financially supported by the JSPS KAKENHI (Grant nos. JP20225003, JP15K05467, JP24750119, JP14J02656, JP17K19102, and JP18K14242), Tohoku University Molecule and Material Synthesis Platform in the Nanotechnology Platform Project, and CREST, JST (Grant No. JPMJCR12L3). M.Y. thanks the support by the 111 project (B18030) of China. We thank Dr. Y. Nakano for ICP-AES measurements. The scientific grants R-143-000-A80-114 and R-143- 000-A65-133 from the National University of Singapore are gratefully acknowledged. Computational resources from NSCC are gratefully acknowledged. This paper is Contribution No. 61 from the Research Center for Thermal and Entropic Science.
Publisher Copyright:
© 2020 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
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 -