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Title: Ferro- and antiferro-magnetism in (Np, Pu)BC

Two new transuranium metal boron carbides, NpBC and PuBC, have been synthesized. Rietveld refinements of powder XRD patterns of (Np,Pu)BC confirmed in both cases isotypism with the structure type of UBC. Temperature dependent magnetic susceptibility data reveal antiferromagnetic ordering for PuBC below T{sub N} = 44 K, whereas ferromagnetic ordering was found for NpBC below T{sub C} = 61 K. Heat capacity measurements prove the bulk character of the observed magnetic transition for both compounds. The total energy electronic band structure calculations support formation of the ferromagnetic ground state for NpBC and the antiferromagnetic ground state for PuBC.
Authors:
 [1] ;  [2] ;  [3] ;  [4] ;  [5] ; ; ;  [1] ; ;  [6]
  1. European Commission, Joint Research Centre (JRC), Institute for Transuranium Elements (ITU), Postfach 2340, 76125 Karlsruhe (Germany)
  2. (Poland)
  3. Institute of Physics, ASCR, Na Slovance 2, CZ-18221 Prague (Czech Republic)
  4. Faculty of Applied Physics and Mathematics, Gdansk University of Technology, Narutowicza 11/12, 80-233 Gdansk (Poland)
  5. (Czech Republic)
  6. Institute for Physical Chemistry, University Vienna, Währingerstrasse 42, A-1090 Wien (Austria)
Publication Date:
OSTI Identifier:
22415282
Resource Type:
Journal Article
Resource Relation:
Journal Name: APL materials; Journal Volume: 3; Journal Issue: 4; Other Information: (c) 2015 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ANTIFERROMAGNETISM; BORON CARBIDES; ELECTRONIC STRUCTURE; FERROMAGNETISM; GROUND STATES; MAGNETIC SUSCEPTIBILITY; NEPTUNIUM COMPOUNDS; PLUTONIUM COMPOUNDS; POWDERS; SPECIFIC HEAT; TEMPERATURE DEPENDENCE; X-RAY DIFFRACTION