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Nuclear Spin Isomers: Engineering a Et 4 N[DyPc 2 ] Spin Qudit
Author(s) -
MorenoPineda Eufemio,
Damjanović Marko,
Fuhr Olaf,
Wernsdorfer Wolfgang,
Ruben Mario
Publication year - 2017
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201706181
Subject(s) - spin (aerodynamics) , dysprosium , hyperfine structure , quadrupole splitting , chemistry , magnetization , squid , qubit , physics , condensed matter physics , nuclear magnetic resonance , quantum , atomic physics , magnetic field , quantum mechanics , inorganic chemistry , ecology , biology , thermodynamics
Two dysprosium isotopic isomers were synthesized: Et 4 N[ 163 DyPc 2 ] ( 1 ) with I =5/2 and Et 4 N[ 164 DyPc 2 ] ( 2 ) with I =0 (where Pc=phthalocyaninato). Both isotopologues are single‐molecule magnets (SMMs); however, their relaxation times as well as their magnetic hystereses differ considerably. Quantum tunneling of the magnetization (QTM) at the energy level crossings is found for both systems via ac‐susceptibility and μ‐SQUID measurements. μ‐SQUID studies of 1 ( I =5/2) reveal several nuclear‐spin‐driven QTM events; hence determination of the hyperfine coupling and the nuclear quadrupole splitting is possible. Compound 2 ( I =0) shows only strongly reduced QTM at zero magnetic field. 1 ( I =5/2) could be used as a multilevel nuclear spin qubit, namely qudit ( d =6), for quantum information processing (QIP) schemes and provides an example of novel coordination‐chemistry‐discriminating nuclear spin isotopes. Our results show that the nuclear spin of the lanthanide must be included in the design principles of molecular qubits and SMMs.