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

Abstract

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.

Authors:
; ;  [1];  [2];  [3];  [2]
  1. International Centre for Materials Science, Chemistry and Physics of Materials Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Bangalore 560064 (India)
  2. Center for Materials for Information Technology, University of Alabama, Tuscaloosa, Alabama 35487 (United States)
  3. (United States)
Publication Date:
OSTI Identifier:
22399003
Resource Type:
Journal Article
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 106; Journal Issue: 18; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0003-6951
Country of Publication:
United States
Language:
English
Subject:
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

Citation Formats

Negi, D. S., Loukya, B., Datta, R., E-mail: ranjan@jncasr.ac.in, Ramasamy, K., Center for Integrated Nanotechnology, Los Alamos National Laboratory, Albuquerque, New Mexico 87123, and Gupta, A. Spatially resolved quantitative magnetic order measurement in spinel CuCr{sub 2}S{sub 4} nanocrystals. United States: N. p., 2015. Web. doi:10.1063/1.4919864.
Negi, D. S., Loukya, B., Datta, R., E-mail: ranjan@jncasr.ac.in, Ramasamy, K., Center for Integrated Nanotechnology, Los Alamos National Laboratory, Albuquerque, New Mexico 87123, & Gupta, A. Spatially resolved quantitative magnetic order measurement in spinel CuCr{sub 2}S{sub 4} nanocrystals. United States. doi:10.1063/1.4919864.
Negi, D. S., Loukya, B., Datta, R., E-mail: ranjan@jncasr.ac.in, Ramasamy, K., Center for Integrated Nanotechnology, Los Alamos National Laboratory, Albuquerque, New Mexico 87123, and Gupta, A. Mon . "Spatially resolved quantitative magnetic order measurement in spinel CuCr{sub 2}S{sub 4} nanocrystals". United States. doi:10.1063/1.4919864.
@article{osti_22399003,
title = {Spatially resolved quantitative magnetic order measurement in spinel CuCr{sub 2}S{sub 4} nanocrystals},
author = {Negi, D. S. and Loukya, B. and Datta, R., E-mail: ranjan@jncasr.ac.in and Ramasamy, K. and Center for Integrated Nanotechnology, Los Alamos National Laboratory, Albuquerque, New Mexico 87123 and Gupta, A.},
abstractNote = {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.},
doi = {10.1063/1.4919864},
journal = {Applied Physics Letters},
issn = {0003-6951},
number = 18,
volume = 106,
place = {United States},
year = {2015},
month = {5}
}