We present magnetic-field-dependent small-angle neutron scattering data for the ferromagnetic nanocomposite Nanoperm (Fe89Zr7B3Cu1). The spin-misalignment scattering in the approach-to-saturation regime unexpectedly reveals pronounced lobes of high intensity at angles +/- 30-40 degrees relative to the magnetic-field axis. Based on numerical calculations, the four-fold angular symmetry of the scattering pattern can be explained in terms of local spin misalignment, which originates from dipolar stray fields due to the mismatch of the saturation-magnetization values between the bcc Fe particles and the amorphous magnetic matrix.
Neutron scattering and modeling of dipole-field-induced spin disorder in Nanoperm / Vecchini, C; Moze, Oscar; Suzuki, K; Pranzas, Pk; Weissmuller, J; Michels, A.. - In: APPLIED PHYSICS LETTERS. - ISSN 0003-6951. - STAMPA. - 87:20(2005), pp. 1-3. [10.1063/1.2132540]
Neutron scattering and modeling of dipole-field-induced spin disorder in Nanoperm
MOZE, Oscar;
2005
Abstract
We present magnetic-field-dependent small-angle neutron scattering data for the ferromagnetic nanocomposite Nanoperm (Fe89Zr7B3Cu1). The spin-misalignment scattering in the approach-to-saturation regime unexpectedly reveals pronounced lobes of high intensity at angles +/- 30-40 degrees relative to the magnetic-field axis. Based on numerical calculations, the four-fold angular symmetry of the scattering pattern can be explained in terms of local spin misalignment, which originates from dipolar stray fields due to the mismatch of the saturation-magnetization values between the bcc Fe particles and the amorphous magnetic matrix.
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