X-ray magnetic circular dichroism study on CeFe
                    <sub>2</sub>

Delobbe, Anne; Dias, A.-M.; Finazzi, Marco; Štichauer, L.; Kappler, J.P.; Krill, G.

doi:10.1209/epl/i1998-00359-2

Cited by 37 publications

(31 citation statements)

References 29 publications

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“…29 In all experiments, an antiparallel coupling of the Ce and Fe moments is found. This coupling is also reproduced in our calculation, as well as in earlier calculations.…”

Section: Band-structure Calculationmentioning

confidence: 64%

Electronic structure of the strongly hybridized ferromagnetCeFe2

et al. 2000

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We report on results from high-energy spectroscopic measurements on CeFe 2 , a system of particular interest due to its anomalous ferromagnetism with an unusually low Curie temperature and small magnetization compared to the other rare-earth iron Laves phase compounds. Our experimental results, obtained using core-level and valence-band photoemission, inverse photoemission and soft x-ray absorption techniques, indicate very strong hybridization of the Ce 4 f states with the delocalized band states, mainly the Fe 3d states. In the interpretation and analysis of our measured spectra, we have made use of two different theoretical approaches: The first one is based on the Anderson impurity model, with surface contributions explicitly taken into account. The second method consists of band-structure calculations for bulk CeFe 2 . The analysis based on the Anderson impurity model gives calculated spectra in good agreement with the whole range of measured spectra, and reveals that the Ce 4 f -Fe 3d hybridization is considerably reduced at the surface, resulting in even stronger hybridization in the bulk than previously thought. The band-structure calculations are ab initio fullpotential linear muffin-tin orbital calculations within the local-spin-density approximation of the density functional. The Ce 4 f electrons were treated as itinerant band electrons. Interestingly, the Ce 4 f partial density of states obtained from the band-structure calculations also agree well with the experimental spectra concerning both the 4 f peak position and the 4 f bandwidth, if the surface effects are properly taken into account. In addition, results, notably the partial spin magnetic moments, from the band-structure calculations are discussed in some detail and compared to experimental findings and earlier calculations.

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“…29 In all experiments, an antiparallel coupling of the Ce and Fe moments is found. This coupling is also reproduced in our calculation, as well as in earlier calculations.…”

Section: Band-structure Calculationmentioning

confidence: 64%

Electronic structure of the strongly hybridized ferromagnetCeFe2

et al. 2000

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“…L z , S z , and T z represent the orbital magnetic moment, the spin magnetic moment and the magnetic dipole moment, respectively. According to Delobbe et al [21], we have considered that the T z term is zero. By using the number of holes in Ce-5d band is 8.5, we estimated the values of L z , 2 S z , and L z + 2 S z .…”

Section: Resultsmentioning

confidence: 99%

X-ray magnetic circular dichroism studies in Ce(Fe1−Co )2

Mizumaki

Yoshii

Watanabe

et al. 2006

Journal of Alloys and Compounds

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“…This calculated value is in good agreement with the hL z i=hS z i ¼ À8. On the other hand, the small ratio hL z i=hS z i$ À 4:75 (far away from À8) for 8 nm, is the result of the 4f electron delocalization character [19]. Let us consider a total 4f magnetic moment of Ce, M 4f are 0.2m B for bulk and 0.15m B for nanoparticles.…”

Section: Resultsmentioning

confidence: 99%