TY - JOUR
T1 - Multiple-decker phthalocyaninato Tb(III) single-molecule magnets and Y(III) complexes for next generation devices
AU - Katoh, Keiichi
AU - Isshiki, Hironari
AU - Komeda, Tadahiro
AU - Yamashita, Masahiro
N1 - Funding Information:
This work was financially supported by a Grant-in-Aid for Scientific Research (S) (Grant Nos. 20225003 (K.K. and M.Y.)) and 448, 2005 (H.I. and T.K) from the Ministry of Education, Culture, Sports, Science, and Technology , Japan. This work was also supported by an International Collaborative Research Grant from the National Institute of Information and Communications Technology of Japan (H.I. and T.K). We thank T. Kajiwara for magnetic properties analysis, as well as M. Nakano for discussions, Y. Nakazawa for heat capacity measurements, W. Wernsdorfer for micro-SQUID measurements, B.K. Breedlove and N. Ishikawa for discussions, J. Liu for STM measurements.
PY - 2011/9
Y1 - 2011/9
N2 - A new magnetic relaxation phenomenon for an Ising dimer of a Tb-phthalocyaninato triple-decker SMM Tb2(obPc)3 (1) is reported. In Argand plots, the magnetic relaxation splits from a one-component system into a two-component system (temperature-independent and temperature-dependent regimes) in a dc magnetic field. There was clear evidence that the magnetic relaxation mechanisms for the Tb3+ dimer depended heavily on the temperature and the dc magnetic field. The relationships among the molecular structure, ligand field, ground state, and SMM properties in a direct current (dc) magnetic field are discussed. Furthermore, in order to investigate the stability of the complexes in vacuum evaporation (dry) process and the control of their surface morphology after transferring to a surface, we studied the lanthanoid-phthalocyaninato triple-decker molecule Y2Pc3 deposited on a Au(111) surface using a low-temperature scanning tunneling microscope. It is important to both understand and control the quantum properties of Ln-Pc multiple-decker SMMs with an external field and the monolayer or multi-layer structures on a substrate for next generation devices, such as magnetic information storage.
AB - A new magnetic relaxation phenomenon for an Ising dimer of a Tb-phthalocyaninato triple-decker SMM Tb2(obPc)3 (1) is reported. In Argand plots, the magnetic relaxation splits from a one-component system into a two-component system (temperature-independent and temperature-dependent regimes) in a dc magnetic field. There was clear evidence that the magnetic relaxation mechanisms for the Tb3+ dimer depended heavily on the temperature and the dc magnetic field. The relationships among the molecular structure, ligand field, ground state, and SMM properties in a direct current (dc) magnetic field are discussed. Furthermore, in order to investigate the stability of the complexes in vacuum evaporation (dry) process and the control of their surface morphology after transferring to a surface, we studied the lanthanoid-phthalocyaninato triple-decker molecule Y2Pc3 deposited on a Au(111) surface using a low-temperature scanning tunneling microscope. It is important to both understand and control the quantum properties of Ln-Pc multiple-decker SMMs with an external field and the monolayer or multi-layer structures on a substrate for next generation devices, such as magnetic information storage.
KW - Lanthanoids
KW - Magnetic properties
KW - Molecular sublimation
KW - Single-molecule magnets
KW - STM
KW - STS
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U2 - 10.1016/j.ccr.2011.02.024
DO - 10.1016/j.ccr.2011.02.024
M3 - Review article
AN - SCOPUS:79960443745
SN - 0010-8545
VL - 255
SP - 2124
EP - 2148
JO - Coordination Chemistry Reviews
JF - Coordination Chemistry Reviews
IS - 17-18
ER -