AI Article Synopsis
- A new theory explains how suspensions with antiferromagnetic nanoparticles behave in magnetic fields.
- These tiny particles have unique magnetic properties because they can generate a spontaneous magnetic moment despite being antiferromagnetic.
- When a direct current (DC) magnetic field is applied and its strength is increased, the orientation of these magnetic moments shifts from being aligned with the field to a sideways direction, affecting the system's magnetic characteristics.
Article Abstract
A theory describing magneto-orientational properties of suspensions containing antiferromagnetic nanoparticles is developed. Due to their small size, these particles possess, apart from an anisotropic magnetic susceptibility pertinent to antiferromagnets, a spontaneous magnetic moment caused by sublattice decompensation. In a colloid subjected to a DC field of increasing strength an orientational crossover takes place: the particle magnetic moments, initially aligned along the field, turn to the transverse orientation. This behavior considerably changes the observable characteristics of the system: the spectrum of linear dynamic susceptibility and the integral time of magnetic relaxation under a pulse field.
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| http://dx.doi.org/10.1088/0953-8984/20/20/204120 | DOI Listing |
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