Induced spin polarization in Cu spacer layers in Co/Cu multilayers

Samant, Mahesh G.; Stöhr, J.; Parkin, S. S. P.; Held, G. A.; Hermsmeier, B.; Herman, Frank; Schilfgaarde, Mark van; Duda, Laurent; Mancini, Derrick C.; Wassdahl, N.; Nakajima, Reiko

doi:10.1103/physrevlett.72.1112

Cited by 219 publications

(105 citation statements)

References 13 publications

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“…This was accomplished by normalizing the XAS spectra, recorded over a wide energy range, to the same edge jump across the L 3 and L 2 edges. 6,12 The XAS results show that, within experimental accuracy, the number of empty d states is the same for Co metal and Co in the multilayer. We have therefore scaled the two XES spectra to yield the same integrated intensities, reflecting an equal number of filled d states.…”

Section: Resultsmentioning

confidence: 82%

Determination of the electronic density of states near buried interfaces: Application to Co/Cu multilayers

et al. 1996

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High-resolution L 3 x-ray absorption and emission spectra of Co and Cu in Co/Cu multilayers are shown to provide unique information on the occupied and unoccupied density of d states near buried interfaces. The d bands of both Co and Cu interfacial layers are shown to be considerably narrowed relative to the bulk metals, and for Cu interface layers the d density of states is found to be enhanced near the Fermi level. The experimental results are confirmed by self-consistent electronic structure calculations. ͓S0163-1829͑96͒07628-X͔

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Section: Resultsmentioning

confidence: 82%

Determination of the electronic density of states near buried interfaces: Application to Co/Cu multilayers

et al. 1996

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“…Exchange biased systems in which unidirectional anisotropy is induced in a ferromagnetic layer by an adjacent antiferromagnetic layer have found widespread use in read heads of hard drives [3]. Soft x-ray magnetic dichroism spectroscopies play an ever increasing role in improving our understanding of complex heteromagnetic nanostructures since these techniques provide elemental and chemical site specific magnetic information [4,5] with high sensitivity [6] and tuneable probing depth [7]. X-ray spectromicroscopy techniques such as photoemission electron microscopy (PEEM) [8], scanning transmission x-ray microscopy (STXM) [9] or full field x-ray microscopy [10] add spatial resolution down to a few nm [11].…”

mentioning

confidence: 99%

Angle-DependentNi2+X-Ray Magnetic Linear Dichroism: Interfacial Coupling Revisited

et al. 2007

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Using x ray magnetic linear dichroism (XMLD) for magnetometry requires detailed knowledge of its dependence on the relative orientation of polarization, magnetic moments, and crystallographic axes. We show that Ni 2+ L 2,3 XMLD in cubic lattices has to be described as linear combination of two fundamental spectra − not one as previously assumed. The spectra are calculated using atomic multiplet theory and the angular dependence is derived from crystal field symmetry. Applying our results to Co/NiO(001) interfaces, we find perpendicular coupling between Ni and Co moments.

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“…V below), although the multiple scattering theory and muffin-tin approximation used are not considered accurate to calculate the XMCD at the Co L 2,3 edges [54,55]. This value is slightly lower than 2.49 calculated for bulk Co [56] or 2.4 calculated for Co adatoms on Pt(111) [57]. A reduction in the number of 3d holes at the Co sites was already detected in the pre-edge of the Co K edge XANES as the negative area A I (Fig.…”

Section: Co K and L 23 Edgesmentioning

confidence: 53%

Perpendicular magnetic anisotropy in granular multilayers of CoPd alloyed nanoparticles

et al. 2016

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Co-Pd multilayers obtained by Pd capping of pre-deposited Co nanoparticles on amorphous alumina are systematically studied by means of high-resolution transmission electron microscopy, x-ray diffraction, extended x-ray absorption fine structure, SQUID-based magnetometry, and x-ray magnetic circular dichroism. The films are formed by CoPd alloyed nanoparticles self-organized across the layers, with the interspace between the nanoparticles filled by the non-alloyed Pd metal. The nanoparticles show atomic arrangements compatible with short-range chemical order of L1 0 strucure type. The collective magnetic behavior is that of ferromagnetically coupled particles with perpendicular magnetic anisotropy, irrespective of the amount of deposited Pd. For increasing temperature three magnetic phases are identified: hard ferromagnetic with strong coercive field, soft-ferromagnetic as in an amorphous asperomagnet, and superparamagnetic. Increasing the amount of Pd in the system leads to both magnetic hardness increment and higher transition temperatures. Magnetic total moments of 1.77(4) μ B and 0.45(4) μ B are found at Co and Pd sites, respectively, where the orbital moment of Co, 0.40(2) μ B , is high, while that of Pd is negligible. The effective magnetic anisotropy is the largest in the capping metal series (Pd, Pt, W, Cu, Ag, Au), which is attributed to the interparticle interaction between de nanoparticles, in addition to the intraparticle anisotropy arising from hybridization between the 3d-4d bands associated to the Co and Pd chemical arrangement in a L1 0 structure type.

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Induced spin polarization in Cu spacer layers in Co/Cu multilayers

Cited by 219 publications

References 13 publications

Determination of the electronic density of states near buried interfaces: Application to Co/Cu multilayers

Determination of the electronic density of states near buried interfaces: Application to Co/Cu multilayers

Angle-DependentNi2+X-Ray Magnetic Linear Dichroism: Interfacial Coupling Revisited

Perpendicular magnetic anisotropy in granular multilayers of CoPd alloyed nanoparticles

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