Quantitative magnetic measurements with transmission electron microscope

Rusz, Ján; Lidbaum, Hans; Liebig, Andreas; Hjörvarsson, Bjørgvin; Oppeneer, Peter M.; Rubino, Stefano; Eriksson, Olle; Leifer, Klaus

doi:10.1016/j.jmmm.2009.06.032

Cited by 12 publications

(4 citation statements)

References 20 publications

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“…Therefore, by taking the ratio of the two equations and neglecting the effect of magnetic dipole operator, one can get rid of the effect of any dynamical coefficients and the ratio of the orbital to spin moments (m orb /m spin ) can be calculated according to EMCD sum rules (as shown in Eq. (3)) since the equation now is free from the factor K [20,23]. Fig.…”

Section: Emcd Study Of Cro 2 Thin Films With Two Different Growth Orimentioning

confidence: 99%

Electron magnetic chiral dichroism in CrO2 thin films using monochromatic probe illumination in a transmission electron microscope

Loukya

Zhang

Gupta

et al. 2012

Journal of Magnetism and Magnetic Materials

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Section: Emcd Study Of Cro 2 Thin Films With Two Different Growth Orimentioning

confidence: 99%

Electron magnetic chiral dichroism in CrO2 thin films using monochromatic probe illumination in a transmission electron microscope

Loukya

Zhang

Gupta

et al. 2012

Journal of Magnetism and Magnetic Materials

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“…[30] Besides, the asymmetry of different diffraction geometries and its influence on the quan-titative magnetic measurement has already been discussed, which refers to the accuracy of quantification. [23,25,[31][32][33][34][35] The third one is the notoriously low intensity and SNR of EMCD signals. A high-quality signal leads to highly reliable quantitative measurements.…”

Section: Introductionmentioning

confidence: 99%

Quantitative measurement of magnetic parameters by electron magnetic chiral dichroism

et al. 2018

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Electron magnetic circular dichroism opens a new door to explore magnetic properties by transmitted electrons in the transmission electron microscope. However, obtaining quantitative magnetic parameters, such as spin and orbital magnetic moment with element-specificity, goes a long way along with the development and improvement of this technique both in theoretical and experimental aspects. In this review, we will give a detailed description of the quantitative electron magnetic circular dichroism (EMCD) technique to measure magnetic parameters with spin-specificity, element-specificity, site-specificity, and orbital-spin-specificity. The discussion completely contains the procedures from raw experimental data acquisition to final magnetic parameters, together with the related custom code we have developed.

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“…Used in combination with sum rules it is even possible to separate spin and orbital moments. [15][16][17][18] The basic mechanism underlying EMCD is the same as for XMCD, the excitation of an electronic transition with change in the magnetic quantum number of an atom by Ϯ1 ͑chiral transition͒. In view of the intrinsic high lateral resolution of the electron microscope a crucial question related to EMCD is then: is it possible to map chiral transitions on the atomic scale with last generation instruments?…”

Section: Introductionmentioning

confidence: 99%

Real-space simulations of spin-polarized electronic transitions in iron

et al. 2010

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After the advent of energy-loss magnetic chiral dichroism ͑EMCD͒ in 2006, rapid progress in theoretical understanding and in experimental performance was achieved, recently demonstrating a spatial resolution of better than 2 nm. Similar to the x-ray magnetic circular dichroism technique, EMCD is used to study atom specific magnetic moments. The latest generation of electron microscopes opens the road to the mapping of spin moments on the atomic scale with this method. Here the theoretical background to reach this challenging aim is elaborated. Numerical simulations of the L 3 transition in an Fe specimen, based on a combination of the density-matrix approach for inelastic electron scattering with the propagation of the probe electron in the lattice potential indicate the feasibility of single spin mapping in the electron microscope.

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Quantitative magnetic measurements with transmission electron microscope

Cited by 12 publications

References 20 publications

Electron magnetic chiral dichroism in CrO2 thin films using monochromatic probe illumination in a transmission electron microscope

Electron magnetic chiral dichroism in CrO2 thin films using monochromatic probe illumination in a transmission electron microscope

Quantitative measurement of magnetic parameters by electron magnetic chiral dichroism

Real-space simulations of spin-polarized electronic transitions in iron

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