Dipolar correlations in square arrays of magnetic nanoparticles
We propose to determine the lateral magnetic correlations in nanoparticle monolayers using polarized GISANS. Our study will elucidate in detail the effect of varying magnetic anisotropy on the interparticle coupling in long-range ordered arrays of cobalt ferrite and iron oxide nanocubes. Low temperature macroscopic magnetization measurements reveal a systematic secondary magnetization reversal for the cobalt ferrite square lattice that is attributed to interparticle coupling in the array. A spin-flip or spin-flop transition from SFM (in saturation) to a SAFM state (near remanence) are two potential scenarios that we propose to investigate. The secondary magnetization reversal is not observed for a square array of iron oxide nanocubes, which might be related to the significantly lower magnetic anisotropy of maghemite. As a result of this experiment, we expect to enhance the understanding of the static magnetic structures and dynamic properties in magnetic nanoparticle arrays, which will be indispensable in any future planning of applications for two-dimensional nanoparticle assemblies.
Please note that you will need to login with your ILL credentials to download the data.
Download DataThe recommended format for citing this dataset in a research publication is in the following format:
MEES Flore; DISCH Sabrina; HONECKER Dirk; ROCHELS Leonhard and STEINKE Nina-Juliane. (2021). Dipolar correlations in square arrays of magnetic nanoparticles. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.5-53-299
ILL has partnered with DataCite as the registration agency
for data persistent identifiers.