TY - JOUR
T1 - Relationship between the coordination geometry and spin dynamics of dysprosium(Iii) heteroleptic triple-decker complexes
AU - Sato, Tetsu
AU - Matsuzawa, Satoshi
AU - Katoh, Keiichi
AU - Yamashita, Masahiro
AU - Breedlove, Brian K.
N1 - Funding Information:
Funding: This work was supported by a Grant-in-Aid for Scientific Research (S) (grant no. 20225003), Grant-in-Aid for Young Scientists (B) (grant no. 24750119), Grant-in-Aid for Scientific Research (C) (grant no. 15K05467) from the Ministry of Education, Culture, Sports, Science, Technology, Japan (MEXT), CREST (JPMJCR12L3) from JST, a Grant-in-aid for JSPS fellows from the Japan Society for the Promotion of Science (JSPS) (25·2441), and Tohoku University Division for International Advanced Research and Education (DIARE). M.Y. is grateful for the support from the 111 project (B18030) from China. S.M. acknowledges the support by MD-program of Tohoku Univ.
Publisher Copyright:
© 2019 by the authors. Licensee MDPI, Basel, Switzerland.
PY - 2019/12
Y1 - 2019/12
N2 - When using single molecule magnets (SMMs) in spintronics devices, controlling the quantum tunneling of the magnetization (QTM) and spin-lattice interactions is important. To improve the functionality of SMMs, researchers have explored the effects of changing the coordination geometry of SMMs and the magnetic interactions between them. Here, we report on the effects of the octa-coordination geometry on the magnetic relaxation processes of dinuclear dysprosium(III) complexes in the low-temperature region. Mixed ligand dinuclear Dy3+ triple-decker complexes [(TPP)Dy(Pc)Dy(TPP)] (1), which have crystallographically equivalent Dy3+ ions, and [(Pc)Dy(Pc)Dy(TPP)] (2), which have non-equivalent Dy3+ ions, (Pc2− = phthalocyaninato; TPP2− = tetraphenylporphyrinato), undergo dual magnetic relaxation processes. This is due to the differences in the ground states due to the twist angle (ϕ) between the ligands. The relationship between the off-diagonal terms and the dual magnetic relaxation processes that appears due to a deviation from D4h symmetry is discussed.
AB - When using single molecule magnets (SMMs) in spintronics devices, controlling the quantum tunneling of the magnetization (QTM) and spin-lattice interactions is important. To improve the functionality of SMMs, researchers have explored the effects of changing the coordination geometry of SMMs and the magnetic interactions between them. Here, we report on the effects of the octa-coordination geometry on the magnetic relaxation processes of dinuclear dysprosium(III) complexes in the low-temperature region. Mixed ligand dinuclear Dy3+ triple-decker complexes [(TPP)Dy(Pc)Dy(TPP)] (1), which have crystallographically equivalent Dy3+ ions, and [(Pc)Dy(Pc)Dy(TPP)] (2), which have non-equivalent Dy3+ ions, (Pc2− = phthalocyaninato; TPP2− = tetraphenylporphyrinato), undergo dual magnetic relaxation processes. This is due to the differences in the ground states due to the twist angle (ϕ) between the ligands. The relationship between the off-diagonal terms and the dual magnetic relaxation processes that appears due to a deviation from D4h symmetry is discussed.
KW - Dy ion
KW - Octa-coordination geometry
KW - Spin dynamics
KW - Triple-decker
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U2 - 10.3390/magnetochemistry5040065
DO - 10.3390/magnetochemistry5040065
M3 - Article
AN - SCOPUS:85094632441
VL - 5
JO - Magnetochemistry
JF - Magnetochemistry
SN - 2312-7481
IS - 4
M1 - 65
ER -