Comment on "Magnetic Relaxations of Antiferromagnetic Nanoparticles in Magnetic Fields"

Details Comment on "Magnetic Relaxations of Antiferromagnetic Nanoparticles in Magnetic Fields" Comment on "Magnetic Relaxations of Antiferromagnetic Nanoparticles in Magnetic Fields"

2002-03-05

arxiv.org/abs/cond-mat/0203088v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

1 page and 1 figure

Scientific paper

We have carried out in ferritin the Field-Cooling method and data analysis proposed by Mamiya et al. (Phys. Rev. Lett. 88, 67202 (2002) at T = 5 K in order to check the time magnetic relaxation of these antiferromagnetic nanoparticles as a function of the magnetic field. We found that relaxation at T = 5 K in ferritin is faster in the absence of magnetic field, in good agreement with the zero-field Resonant Spin Quantum Tunneling observed previously in ferritin (Phys. Rev. Lett. 79, 1754 (1997).

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