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XMCD

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Journal Article
Published: 01 June 2016
American Mineralogist (2016) 101 (6): 1373–1388.
...C. Michael B. Henderson; Carolyn I. Pearce; John M. Charnock; Richard J. Harrison; Kevin M. Rosso Abstract Fe L 2,3 -edge XAS and XMCD studies have been used to unravel structural trends in the MgAl 2 O 4 –Fe 3 O 4 solid solution where thermodynamic modeling has presented a challenge due...
FIGURES | View All (9)
Journal Article
Published: 01 July 2008
American Mineralogist (2008) 93 (7): 1119–1132.
.... This was done at ambient temperatures through the dissimilatory reduction of Fe 3+ -oxyhydroxides containing the appropriate substitutional cations. A combination of L -edge and K -edge X-ray absorption spectroscopy (XAS) and L -edge X-ray magnetic circular dichroism (XMCD) was used to determine the site...
FIGURES | View All (11)
Journal Article
Published: 01 May 2008
American Mineralogist (2008) 93 (5-6): 880–885.
...Claire Carvallo; Philippe Sainctavit; Marie-Anne Arrio; Nicolas Menguy; Yuheng Wang; Georges Ona-Nguema; Sandrine Brice-Profeta Abstract X-ray magnetic circular dichroism (XMCD) experiments were carried out to compare the Fe 2+ / Fe 3+ ratio in nanomagnetite chemically produced from lepidocrocite...
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( a ) Natural V-magnetite Fe  L  2,3  (i) XAS and (ii) <span class="search-highlight">XMCD</span> (x5) ( b ) V  L...
Published: 01 July 2020
Fig. 6. ( a ) Natural V-magnetite Fe L 2,3 (i) XAS and (ii) XMCD (x5) ( b ) V L 2,3 (i) XAS and (ii) XMCD (×20). Using combinations of V(III) and V(IV) calculated data (see Fig. 5 ) a best fit for the Fe L 2,3 XMCD and V L 2,3 XAS and XMCD data is shown (red).
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( a ) Ni  L  2,3  XAS (top) and <span class="search-highlight">XMCD</span> (bottom) spectra, the XAS and <span class="search-highlight">XMCD</span> spe...
Published: 01 August 2017
Fig. 6. ( a ) Ni L 2,3 XAS (top) and XMCD (bottom) spectra, the XAS and XMCD spectra of trevorite (NiFe 2 O 4 ) are shown in red. ( b ) Co L 2,3 XAS and XMCD spectra in the anaerobically produced samples, the XAS and XMCD spectra of Co-ferrite (CoFe 2 O 4 ) are shown in red. % = wt
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Fe  L  2,3  XAS and <span class="search-highlight">XMCD</span> spectra for greigite. (a) XAS spectra and (b) corr...
Published: 01 June 2012
Fig. 1 Fe L 2,3 XAS and XMCD spectra for greigite. (a) XAS spectra and (b) corresponding XMCD spectra for synthetic (black) and natural (red) greigite. The XAS spectra were normalized to their maximum peak. The noticeable intensity difference in the corresponding XMCD patterns is because
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( a ) Comparison of Fe  L  2,3  XAS and (below) Fe  L  2,3  <span class="search-highlight">XMCD</span> spectra of...
Published: 01 August 2017
Fig. 4. ( a ) Comparison of Fe L 2,3 XAS and (below) Fe L 2,3 XMCD spectra of aerobically and anaerobically produced greigite; the XMCD peaks are normalized to peak E; ( b ) Fe L 2,3 XAS of ferrihydrite and goethite; ( c ) Fe L 2,3 XAS and XMCD of nanomagnetite, the latter showing
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Site occupancies from fitting the Fe  L  3  <span class="search-highlight">XMCD</span> spectra. The occupancy of ...
Published: 01 July 2020
Table 1. Site occupancies from fitting the Fe L 3 XMCD spectra. The occupancy of Fe 2+ O h is set at 1 and changes relative to this; previous work suggests this site is least involved in V substitution (see above). Site occupancies (XMCD) XMCD XMCD XAS XMCD Fe 2
Journal Article
Published: 01 June 2012
The Canadian Mineralogist (2012) 50 (3): 667–674.
...Fig. 1 Fe L 2,3 XAS and XMCD spectra for greigite. (a) XAS spectra and (b) corresponding XMCD spectra for synthetic (black) and natural (red) greigite. The XAS spectra were normalized to their maximum peak. The noticeable intensity difference in the corresponding XMCD patterns is because...
FIGURES
Journal Article
Published: 01 April 2010
American Mineralogist (2010) 95 (4): 425–439.
...-ulvöspinel (Fe 3 O 4 -Fe 2 TiO 4 ) solid-solution series was determined using Fe L 2,3 -edge X-ray magnetic circular dichroism (XMCD) coupled with electron microprobe and chemical analysis, Ti L 2,3 -edge and Fe K -edge X-ray absorption spectroscopy (XAS), and unit-cell parameters. Microprobe analyses, cell...
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Journal Article
Published: 01 August 2017
Mineralogical Magazine (2017) 81 (4): 857–872.
...Fig. 6. ( a ) Ni L 2,3 XAS (top) and XMCD (bottom) spectra, the XAS and XMCD spectra of trevorite (NiFe 2 O 4 ) are shown in red. ( b ) Co L 2,3 XAS and XMCD spectra in the anaerobically produced samples, the XAS and XMCD spectra of Co-ferrite (CoFe 2 O 4 ) are shown in red. % = wt...
FIGURES | View All (6)
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Co  L  3,2  XAS absorption and <span class="search-highlight">XMCD</span> spectra of synthetic CoS 2 . The absorp...
Published: 01 January 2006
Figure 21. Co L 3,2 XAS absorption and XMCD spectra of synthetic CoS 2 . The absorption spectra for the two magnetization directions are shown, with the XMCD difference spectra - XMCD intensity enhanced by a factor of three. [Used with permission of S. Suga and the American Physical Society
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Relationship between <span class="search-highlight">XMCD</span> peak heights and bulk composition for ferrimagnet...
Published: 01 June 2016
Figure 5 Relationship between XMCD peak heights and bulk composition for ferrimagnetic samples (small solid diamonds) and paramagnetic samples (larger solid squares). Symbol sizes are in proportion to likely XMCD errors. All data were determined at room temperature except for sample SP9 (Mgt 0.39
Journal Article
Published: 01 May 2006
American Mineralogist (2006) 91 (5-6): 880–893.
... spectroscopic techniques of L 2,3 X-ray absorption spectroscopy (XAS) and X-ray magnetic circular dichroism (XMCD). By comparing XMCD data with calculated spectra, the site occupancies of the Fe cations have been determined. From the analysis of natural ferrite spinels with formulae very close to that of pure...
FIGURES | View All (11)
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Fe  L  2,3  XAS and <span class="search-highlight">XMCD</span> spectra for anaerobically prepared nanogreigites: ...
Published: 01 August 2017
Fig. 5. Fe L 2,3 XAS and XMCD spectra for anaerobically prepared nanogreigites: ( a ) Fe L 2,3 XAS, ( b ) Fe L 2,3 XMCD.
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The experimentally derived <span class="search-highlight">XMCD</span> spectra of end-member Co, Ni, Zn and Mg spi...
Published: 01 November 2002
Fig. 6. The experimentally derived XMCD spectra of end-member Co, Ni, Zn and Mg spinel ferrites. The theoretical XMCD spectrum for Fe 3 O 4 is also shown.
Journal Article
Published: 01 November 2002
European Journal of Mineralogy (2002) 14 (6): 1095–1102.
...Fig. 6. The experimentally derived XMCD spectra of end-member Co, Ni, Zn and Mg spinel ferrites. The theoretical XMCD spectrum for Fe 3 O 4 is also shown. ...
FIGURES | View All (8)
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( a ) V  L  2,3  XAS and ( b ) V  L  2,3  <span class="search-highlight">XMCD</span> for (i) 0.8 wt.% V, (ii) 4.2...
Published: 01 July 2020
Fig. 5. ( a ) V L 2,3 XAS and ( b ) V L 2,3 XMCD for (i) 0.8 wt.% V, (ii) 4.2 wt.% V and (iii) 7.4 wt.% V samples. The XAS spectrum for un-bioreduced V(V)-doped ferrihydrite (7.4 wt.% V) is also shown in ( a ) as (iv) – black (Brik et al. , 2006 ), along with calculated XAS spectra for V
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Upper panel: <span class="search-highlight">XMCD</span> spectra measured on biogenic and abiogenic magnetite nano...
Published: 01 May 2008
F igure 4. Upper panel: XMCD spectra measured on biogenic and abiogenic magnetite nanoparticles at Fe L 2,3 edges. Lower panel: difference of the two XMCD signals. Note that the vertical scales for the two panels are different.
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Comparison of the experimentally derived standard natural magnetite (Bangui...
Published: 01 May 2006
F igure 4. Comparison of the experimentally derived standard natural magnetite (Bangui) XMCD spectrum (solid line) and the calculated XMCD spectrum (dashed line) for ( a ) Fe 3 O 4 and ( b ) Fe 3−δ O 4 .