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Title

Confinement effects on the low temperature magnetic structure of MnP nanocrystals

AuthorsAndrés, Alicia de ; Ramírez, Rafael ; García-Hernández, M. ; Lambert-Milot, S.; Masut, R. A.
Issue Date2011
PublisherAmerican Institute of Physics
CitationApplied Physics Letters 99(18): 182506 (2011)
AbstractThe low temperature magnetic properties of MnP nanocrystals (15-40 nm), both in GaP:MnP epilayers and MnP films, are significantly different compared to bulk and cannot apparently be explained by differences in the structure. A simple model of localized spins is used to describe the magnetic screw structure confined to nanocrystals. The results indicate that the observed magnetic behaviour is related to the nanometric size and to changes in the coupling constants most probably localized at an external grain shell. The nucleation of helical regions at the surface of the ferromagnetic grains is proposed as a possible mechanism for the reversal of the magnetization. © 2011 American Institute of Physics.
Publisher version (URL)http://dx.doi.org/10.1063/1.3658393
URIhttp://hdl.handle.net/10261/75480
DOI10.1063/1.3658393
Identifiersdoi: 10.1063/1.3658393
issn: 0003-6951
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