Nuclear Spin Driven Quantum Tunneling of Magnetization in a New Lanthanide Single-Molecule Magnet: Bis(phthalocyaninato)holmium anion

Abstract

The first measurements of magnetization hysteresis loops on diluted single crystal of [(Pc)2Ho]-TBA+ (Pc: phthalocyaninato, TBA: tetrabutylammonium) in the subkelvin temperature range are reported. Characteristic staircase-like structure was observed, indicating the occurrence of the quantum tunneling of magnetization (QTM), which is a characteristic feature of SMMs. The quantum process in the new lanthanide SMMs is due to resonant quantum tunneling between entangled states of the electronic and nuclear spin systems, which is an essentially different mechanism from those of the known transition-metal-cluster SMMs. Evidence of the two-body quantum process was also observed for the first time in lanthanide complex systems.

Received November 26, 2004; Published on Web February 23, 2005

References in corpus (4)

• Quantum Computing in Molecular Magnets
• Nuclear spin driven quantum relaxation in LiY_0.998Ho_0.002F_4
• Spin-spin cross-relaxation in single-molecule magnets
• Determination of the magnetic anisotropy axes of single-molecule magnets

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