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Evidence of a core–shell structure in the antiferromagnetic La0.2Ce0.8CrO3 nanoparticles by neutron scattering

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Abstract

We report the evidence of a core–shell structure in the antiferromagnetic La0.2Ce0.8CrO3 nanoparticles by using a combination of neutron diffraction, polarized neutron small angle scattering (SANSPOL), and dc magnetization techniques. The neutron diffraction study establishes that the present nanoparticles are antiferromagnetic in nature. The magnetic scattering in the SANSPOL study arises from the shell part of the nanoparticles due to the disordered surface spins. The analysis of the SANSPOL data shows that these nanoparticles have a mean core diameter of 12.3±1.1 nm, and a shell thickness of 2.8±0.4 nm, giving a core–shell structure with an antiferromagnetic core, and a shell with a net magnetic moment under an applied magnetic field.

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Acknowledgements

The authors are grateful to R. Shukla and A.K. Tyagi of Chemistry Division, Bhabha Atomic Research Centre, Mumbai, India for providing the sample.

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Authors and Affiliations

  1. Solid State Physics Division, Bhabha Atomic Research Centre, Mumbai, 400085, India

    P. K. Manna, S. M. Yusuf & M. D. Mukadam

  2. Laboratory for Neutron Scattering, ETH Zurich and Paul Scherrer Institut, 5232, Villigen-PSI, Switzerland

    J. Kohlbrecher

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  1. P. K. Manna
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  2. S. M. Yusuf
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  3. M. D. Mukadam
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Correspondence to S. M. Yusuf.

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Manna, P.K., Yusuf, S.M., Mukadam, M.D. et al. Evidence of a core–shell structure in the antiferromagnetic La0.2Ce0.8CrO3 nanoparticles by neutron scattering. Appl. Phys. A 109, 385–390 (2012). https://doi.org/10.1007/s00339-012-7262-2

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  • DOI: https://doi.org/10.1007/s00339-012-7262-2

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