Spatially resolved quantitative magnetic order measurement in spinel CuCr{sub 2}S{sub 4} nanocrystals

Journal Article · Mon May 04 00:00:00 EDT 2015 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4919864· OSTI ID:22399003

Negi, D. S.; Loukya, B.; Ramasamy, K. ^[1]; Gupta, A. ^[1]

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1. Center for Materials for Information Technology, University of Alabama, Tuscaloosa, Alabama 35487 (United States)

We have utilized spatially resolved high resolution electron energy loss spectroscopy to quantify the relative percentage of ferromagnetic order in the core and the surface regions of CuCr{sub 2}S{sub 4} nanoparticles with nanocube and nanocluster morphology. The organic capping layer is found to play a significant role in restoring magnetic order at the surface. The technique is based on recording the fine features of the Cr L{sub 3} absorption edge and matching them with the theoretical spectra. The nanoscale probing technique we have developed is quite versatile and can be extended to understand magnetic ordering in a number of nanodimensional magnetic materials.

• OSTI ID: 22399003
• Journal Information: Applied Physics Letters, Vol. 106, Issue 18; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
77 NANOSCIENCE AND NANOTECHNOLOGY
ABSORPTION
CHROMIUM SULFIDES
COPPER COMPOUNDS
ELECTRONS
ENERGY-LOSS SPECTROSCOPY
LAYERS
MAGNETIC MATERIALS
MAGNETIZATION
MORPHOLOGY
NANOMATERIALS
NANOPARTICLES
NANOSTRUCTURES
PROBES
RESOLUTION
SPINELS
SURFACES