Superparamagnetic behaviour of antiferromagnetic DyPO4 nanoparticles

  title={Superparamagnetic behaviour of antiferromagnetic DyPO4 nanoparticles},
  author={Tiberiu Gabriel Sorop and Marco Evangelisti and Markus Haase and L. Jos de Jongh},
  journal={Journal of Magnetism and Magnetic Materials},
Abstract We report on the very-low-temperature magnetic AC susceptibility of antiferromagnetic DyPO4 nanoparticles with a very high surface to volume ratio. The results are interpreted in terms of superparamagnetic relaxation of the Neel vector arising from a relatively large number ≈0.2Na of uncompensated spins probably existing on the surface of the nanoparticles. 
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