1999/12/13 by A. M. Gomes, Gomes, A. M., M. A. Novak +8
Chemical Engineering · Materials Science · Physics and Astronomy · #Advanced Chemical Physics Studies #Catalysis and Oxidation Reactions #FOS: Physical sciences #Magnetism in coordination complexes #Mesoscale and Nanoscale Physics (cond-mat.mes-hall) #cond-mat.mes-hall
paper · pdf · doi:10.48550/arxiv.cond-mat/9912224
16 pages, 6 figures, submitted to PRB
arxiv created 1999/12/13 · openalex publication_date 1999/12/13 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We present low temperature specific heat and ac-susceptibility measurements on Fe8 powdered sample. Below 1.3 K, superparamagnetic blocking effects as well as an excess specific heat contribution are evident. The latter is attributed to a splitting of the ground state doublet in an inhomogeneous local field of hyperfine and dipolar origin. The local field contributions are evident in the resonances observed in the field dependent ac-susceptibility and specific heat below 0.5 K. The low temperature Schottky contribution allowed us to check the crystal field parameters of effective spin Hamiltonians, recently proposed to simulate EPR and inelastic neutron scattering experiments.