Abstract
We present experimental evidence of surface induced disordering at magnetic FeCoPd nanoparticles during the L10-A1 phase transition using high-resolution aberration-corrected electron microscopy and strain mapping. In situ electron diffraction studies show a narrow temperature range of fully ordered L10 structure. The order-disorder transition is size dependent and induces strong lattice deformation in outer part of the nanocrystals. The formation of unusually large strain of 20% is discussed in terms of core-shell structure formation with surface disordered layer and ordered core.
Original language | English |
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Article number | 115703 |
Journal | Physical review letters |
Volume | 103 |
Issue number | 11 |
DOIs | |
Publication status | Published - 2009 Sep 11 |
ASJC Scopus subject areas
- Physics and Astronomy(all)