Spin Tunneling in Fe$_8$ Molecular Nanomagnets [Comment on Europhys. Lett. 47, 722, 1999, by Del Barco et al.]
Spin Tunneling in Fe8 powder : a comment on Europhys. Lett. 47, 722, 1999, by Del Berco et al.
cond-mat.mes-hall↗
arXiv subjects
G. Bellessa
Publications and source records attributed to G. Bellessa.
Reply to the Comment of Chudnovski and Garanin on Phonon assisted Tunneling in Mn_{12} (PRL 83, 416 (1999))
We reply to the comment of Chudnovsky and Garanin on the tunneling rate in Mn_{12}.
cond-mat.mes-hall↗
Quantum Coherence in Fe8 Molecular Nanomagnets
We report observation of coherent quantum oscilations in spin-10 Fe8 molecular clusters. The powder of magnetically oriented Fe8 crystallites was placed inside a resonator, in a dc magnetic field perpendicular to the magnetization axis. The field dependence of the ac-susceptibility was measured up to 5 T, at 680 MHz, down to 25 mK. Two peaks in the imaginary part of the susceptibility have been detected, whose positions coincide, without any fitting parameters, with the predicted two peaks corresponding to the quantum splitting of the ground state in the magnetic field parallel and perpendicular to the hard magnetization axis.
cond-mat↗