TITLE

X-ray magnetic circular dichroism of model Heisenberg ferromagnets

AUTHOR(S)
Rogalev, Andrei; Goulon, Jose´
PUB. DATE
February 2000
SOURCE
AIP Conference Proceedings;2000, Vol. 506 Issue 1, p336
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We review first the principles of the X-ray magnetic circular dichroism (XMCD) which will be used to investigate the magnetic properties of Europium Chalcogenides. These compounds are good models of magnetism in solids and were selected to illustrate the potentialities and limitations XMCD at high excitation energy. A thorough analysis of the Eu L-edges XMCD spectra allowed us to identify several effects which, if they are not properly taken into account, may cause the failure of the magneto-optical sum rules at the L-edge of rare-earths. These effects include: (i) the exchange splitting of the 2p core states; (ii) the crystal field splitting of the 5d final states, and (iii) the strong 2p→4f quadrupolar contributions to the XMCD spectra. It is also shown that Magnetic EXAFS measurements at the Eu L-edges combined with XMCD studies at the Chalcogen K-edges produce strong evidence that the highly localized 4f moments of Eu are indirectly coupled via the magnetically polarized p-states of the anions. This is the first time that such magnetic interactions mediated by the anions are unambiguously detected by X-ray absorption spectroscopy. © 2000 American Institute of Physics.
ACCESSION #
6029501

 

Related Articles

  • Requirements for x-ray magnetic circular dichroism on paramagnetic biological systems and model compounds. Funk, Tobias; Friedrich, Stephan; Young, Anthony; Arenholz, Elke; Cramer, Stephen P. // Review of Scientific Instruments;Mar2002, Vol. 73 Issue 3, p1649 

    We have built an end station for x-ray magnetic circular dichroism (XMCD) measurements on proteins and paramagnetic compounds. Our current setup reaches a base temperature of 2.6 K and magnetic fields up to 6 T and is operated at beamline 4.02 of the Advanced Light Source. In this article we...

  • Transmission X-ray microscopy using X-ray magnetic circular dichroism. Eimüller, T.; Fischer, P.; Köhler, M.; Scholz, M.; Guttmann, P.; Denbeaux, G.; Glück, S.; Bayreuther, G.; Schmahl, G.; Attwood, D.; Schütz, G. // Applied Physics A: Materials Science & Processing;2001, Vol. 73 Issue 6, p697 

    X-ray magnetic circular dichroism (X-MCD) was used as a large, element-specific and quantitative magnetic contrast mechanism in the soft X-ray microscopes at BESSY I (Berlin) and the ALS (Berkeley). The present state and potential of magnetic transmission X-ray microscopy (MTXM) is outlined. The...

  • XMCD at L[sub II,III] edges of rare-earths: electric quadrupolar and dipolar effects. Giorgetti, Ch.; Dartyge, E.; Baudelet, F.; Brouder, Ch. // Applied Physics A: Materials Science & Processing;2001, Vol. 73 Issue 6, p703 

    X-ray Magnetic Circular Dichroism (XMCD) at L[sub II,III] edges of rare earths in rare earth–3d transition metal compounds is still a subject of study. We present experimental evidence of electric quadrupolar transitions at L[sub III] and L[sub II] edges of Er in the ErFe[sub 2] Laves...

  • Magnetic circular dichroism in soft X-ray resonant inelastic scattering. Braicovich, L.; Borgatti, F.; Tagliaferri, A.; Ghiringhelli, G.; Brookes, N.B.; Ferriani, P.; Bertoni, C.M. // Applied Physics A: Materials Science & Processing;2001, Vol. 73 Issue 6, p679 

    We discuss the application of resonant inelastic X-ray scattering to the study of magnetic systems in the soft X-ray range. To this end we distinguish two broad areas. In the first the layout of the experiment is such that the absorption magnetic circular dichroism (MCD) is not zero. In the...

  • Perfect crystal and mosaic crystal quarter-wave plates for circular magnetic x-ray dichroism... Giles, C.; Malgrange, C.; Goulon, J.; de Bergevin, F.; Vettier, C.; Fontaine, A.; Dartyge, E.; Pizzini, S.; Baudelet, F.; Freund, A. // Review of Scientific Instruments;Feb1995, Vol. 66 Issue 2, p1549 

    Discusses the use of perfect crystal and mosaic crystal quarter-wave plates for circular magnetic x-ray dichroism experiments. Conventional method for creating circularly polarized x rays for such experiments; Principle of the x-ray quarter-wave plate; Switching of the polarization.

  • Soft x-ray circular polarizer using magnetic circular dichroism at the Fe L[sub 3] line. Kortright, J.B.; Kim, S.-K. // Applied Physics Letters;9/15/1997, Vol. 71 Issue 11, p1446 

    Investigates the conversion of linearly polarized soft X-ray to elliptical polarization using magnetic circular dichroism. Components of the resonant elliptical polarizer; Utilization of the elliptical polarizing line filters; Use of soft X-ray polarization measurements.

  • Mn K-Edge XMCD Study of the Mixed-Valence State of Mn-Based Molecular Nanomagnets. Subías, G.; García, J.; Sánchez, M. C. // AIP Conference Proceedings;2007, Vol. 882 Issue 1, p783 

    X-ray Magnetic Circular Dichroism (XMCD) measurements of the Mn12Ac and Mn4OAc molecular magnets compared with several manganites, such as LaMn0.5Ga0.5O3 (Mn3+ reference), LaMn0.5Ni0.5O3 (Mn4+ reference) and the magnetoresistive La0.67Ca0.33MnO3 are reported. The Mn K edge XAS and XMCD spectra...

  • Element-specific imaging of magnetic domains at 25 nm spatial resolution using soft x-ray microscopy. Fischer, P.; Eimu¨ller, T.; Schu¨tz, G.; Denbeaux, G.; Pearson, A.; Johnson, L.; Attwood, D.; Tsunashima, S.; Kumazawa, M.; Takagi, N.; Ko¨hler, M.; Bayreuther, G. // Review of Scientific Instruments;May2001, Vol. 72 Issue 5, p2322 

    The combination of magnetic circular dichroism as a magnetic contrast mechanism and a transmission x-ray microscope allows imaging of magnetic structures with lateral resolutions down to 25 nm. Results on magneto-optical Tb[sub 25](Fe[sub 75]Co[sub 25])[sub 75] layers system with...

  • An advanced magnetic reflectometer. Brück, Sebastian; Bauknecht, Steffen; Ludescher, Bernd; Goering, Eberhard; Schütz, Gisela // Review of Scientific Instruments;Aug2008, Vol. 79 Issue 8, p083109 

    A new experimental setup dedicated to the measurement of soft-x-ray magnetic absorption spectroscopy and soft-x-ray resonant magnetic reflectometry (soft-XRMR) is presented. XRMR is the combination of standard x-ray reflectometry with x-ray magnetic circular dichroism which provides chemical and...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics