Experimental Confirmation of the X-Ray Magnetic Circular Dichroism Sum Rules for Iron and Cobalt

Chen, C. T.; Idzerda, Y. U.; Lin, Hong‐Ji; Smith, N. V.; Meigs, G.; Chaban, E. E.; Ho, Grace H.; Pellegrin, Eric; Sette, F.

doi:10.1103/physrevlett.75.152

Cited by 1,697 publications

(1,341 citation statements)

References 17 publications

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“…XMCD was measured in a transmission geometry 38,39 at BESSY II using the ALICE diffractometer 40 installed at the PM3 bending magnet beamline. The study of the DyCo 5 layer in high fields was performed with the high-field endstation at the beamline UE46-PGM1 installed at the electron storage ring BESSY II.…”

Section: Methodsmentioning

confidence: 99%

Perpendicular exchange bias in ferrimagnetic spin valves

et al. 2012

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The exchange bias effect refers to the shift of the hysteresis loop of a ferromagnet in direct contact to an antiferromagnet. For applications in spintronics a robust and tunable exchange bias is required. Here we show experimental evidence for a perpendicular exchange bias in a prototypical ferrimagnetic spin valve consisting of DyCo 5 /Ta/Fe 76 Gd 24 , where the DyCo 5 alloy has the role of a hard ferrimagnet and Fe 76 Gd 24 is a soft ferrimagnet. Taking advantage of the tunability of the exchange coupling between the ferrimagnetic layers by means of thickness variation of an interlayer spacer, we demonstrate that perpendicular unidirectional anisotropy can be induced with desirable absolute values at room temperature, without making use of a field-cooling procedure. moreover, the shift of the hysteresis loop can be reversed with relatively low magnetic fields of several hundred oersteds. This flexibility in controlling a robust perpendicular exchange bias at room temperature may be of crucial importance for applications.

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Section: Methodsmentioning

confidence: 99%

Perpendicular exchange bias in ferrimagnetic spin valves

et al. 2012

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“…The 1980ies and early 90ies saw numerous studies related to the magnetism of surfaces and ultrathin films by spin-polarized photoemission by a small number of research groups. These activities later abated mainly because x-ray circular magnetic dichroism was introduced that provided more refined information on magnetic thin films, molecular adlayers and nanostructures, and with higher efficiency [6].…”

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confidence: 99%

Can spin-polarized photoemission measure spin properties in condensed matter?

Osterwalder¹

2012

J. Phys.: Condens. Matter

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Photoemitted electrons move in a vacuum; their quantum state can be completely characterized in terms of energy, momentum and spin polarization by spin-polarized photoemission experiments. A review article in this issue by Heinzmann and Dil (2012 J. Phys.: Condens. Matter 24 173001) considers whether the measured spin properties, i.e. the magnitude and direction of the spin polarization vector, can be traced back to the quantum state from which these electrons originate. The careful conclusion is that they can, which is highly relevant in view of the current interest in these experiments and their application to topological insulators, where the spin-orbit interaction produces spin-polarized surface states.

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“…Magnetization curves were normalized to the total Gd moment μ Gd at 6 T, being μ Gd = μ 2 S + 6 D + μ L the sum of the effective spin magnetic moment μ 2 S + 6 D and the orbital magnetic moment μ L (see also Supporting Information). Both spin and orbital moments were obtained from the sum rules analysis of the absorption spectra,27, 28 which, in accordance with Hund's rule ( L = 0 for Gd in its magnetic ground state), rendered μ L = 0. In order to derive additional magnetic properties of the Gd atoms of the trigon phase, the magnetization curve measured at 5 K was fitted with a Langevin function6

μ_{Gd} (B) = μ [\coth (\frac{μ N B}{k_{normalB} T}) - {(\frac{μ N B}{k_{normalB} T})}^{- 1}]

where B = μ 0 H .…”

Section: Resultsmentioning

confidence: 78%

Growth of Co Nanomagnet Arrays with Enhanced Magnetic Anisotropy

et al. 2016

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A trigon structure formed by submonolayer gadolinium deposition onto Au(111) is revealed as a robust growth template for Co nanodot arrays. Scanning Tunneling Microscopy and X‐Ray Magnetic Circular Dichroism measurements evidence that the Co nanoislands behave as independent magnetic entities with an out‐of‐plane easy axis of anisotropy and enhanced magnetic anisotropy values, as compared to other self‐organized Co nanodot superlattices. The large strain induced by the lattice mismatch at the interface between Co and trigons is discussed as the main reason for the increased magnetic anisotropy of the nanoislands.

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Experimental Confirmation of the X-Ray Magnetic Circular Dichroism Sum Rules for Iron and Cobalt

Cited by 1,697 publications

References 17 publications

Perpendicular exchange bias in ferrimagnetic spin valves

Perpendicular exchange bias in ferrimagnetic spin valves

Can spin-polarized photoemission measure spin properties in condensed matter?

Growth of Co Nanomagnet Arrays with Enhanced Magnetic Anisotropy

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