A new paradigm for exchange bias in polycrystalline thin films

O’Grady, K.; Fernandez-Outon, L.E.; Vallejo-Fernández, G.

doi:10.1016/j.jmmm.2009.12.011

Cited by 426 publications

(411 citation statements)

References 65 publications

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“…The results we obtained for H EB dependency BS are in agreement with Malozemoff model [18] and York model [19]: H EB grows at lower thickness range, then reaches its maximum value, ant then decreases. But in TS systems at 10 nm H EB behavior contradicts such pattern -H EB grows instead of decreasing.…”

Section: Exchange Biassupporting

confidence: 86%

“…A similar approach has been recently developed in a series of papers by the scientific group in York (see for example a review [19]). This approach is based on the idea that exchange bias emerges as a consequence of grains in AF layer, that have their size within a certain range.…”

Section: Exchange Biasmentioning

confidence: 99%

“…But in TS systems at 10 nm H EB behavior contradicts such pattern -H EB grows instead of decreasing. Clearly, models [18,19] do not take into account other important mechanisms of exchange bias initiation in F/AF system. Among such mechanisms, above all, one should consider grain size variation, texture and roughness change with AF layer thickness and F-AF layer order.…”

Section: Exchange Biasmentioning

confidence: 99%

See 2 more Smart Citations

Influence of surface roughness and deposition order on exchange bias in bilayer structures NiFe/IrMn

Shanova

Dzhun

Чеченин

2014

EPJ Web of Conferences

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Using ferromagnetic resonance (FMR) method, magnetic properties of bilayer structures consisting of ferromagnetic (F, Ni 80 Fe 20 ) and antiferromagnetic (AF, Ir 25 Mn 75 ) layers with alternative order of F and AF deposition were studied. It was found that the surface roughness is larger for the samples with AF on the top of F layers. The influence of AF layer thickness on the surface roughness and exchange bias for different types of structures was discussed.

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Section: Exchange Biassupporting

confidence: 86%

Section: Exchange Biasmentioning

confidence: 99%

Section: Exchange Biasmentioning

confidence: 99%

See 1 more Smart Citation

Influence of surface roughness and deposition order on exchange bias in bilayer structures NiFe/IrMn

Shanova

Dzhun

Чеченин

2014

EPJ Web of Conferences

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“…Despite the successful application of this material in exchange bias bilayers, there is still no complete microscopic understanding of the most important parameters, the antiferromagnetic anisotropy and the interface coupling. These properties have recently been inferred by a careful examination of the temperature behaviour of the exchange bias of polygranular thin film bilayers 7 . In order to evaluate the antiferromagnet anisotropy, the magnitude of the exchange bias is fitted to a simple model that depends only upon the grain size distribution, yielding effective anisotropy and coupling parameters.…”

Section: Introductionmentioning

confidence: 99%

Atomistic spin model based on a spin-cluster expansion technique: Application to the IrMn3/Co interface

et al. 2011

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In order to derive tensorial exchange interactions and local magnetic anisotropies in itinerant magnetic systems, an approach combining the Spin-Cluster Expansion with the Relativistic Disordered Local Moment scheme is introduced. The theoretical background and computational aspects of the method are described in detail. The exchange interactions and site resolved anisotropy contributions for the IrMn3/Co(111) interface, a prototype for an exchange bias system, are calculated including a large number of magnetic sites from both the antiferromagnet and ferromagnet. Our calculations reveal that the coupling between the two subsystems is fairly limited to the vicinity of the interface. The magnetic anisotropy of the interface system is discussed, including effects of the Dzyaloshinskii-Moriya interactions that appear due to symmetry breaking at the interface.

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“…Thermal activation determines the amount of rotatable and pinned uncompensated magnetic moments in the AF and is therefore strongly connected to the size of H C and EB both increasing with decreasing temperature [35][36][37].…”

mentioning

confidence: 99%

Preparation and characterisation of epitaxial Pt/Cu/FeMn/Co thin films on (100)‐oriented MgO single crystals

Schmidt

Gräfe

Audehm

et al. 2015

Physica Status Solidi (a)

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This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.FeMn/Co thin-films, a purely metallic exchange-bias system, were prepared on (100)-oriented MgO single crystals. The layers were grown by molecular beam epitaxy (MBE). The crystalline and magnetic properties could be tuned by using sputtered Pt buffer layers deposited at variable temperatures. A transition of the crystalline orientation from (111)-terminated layers at lower deposition temperatures to (100)-terminated layers at temperatures higher than 950 K was established and the impact on the magnetic sample properties was investigated. Here, the detailed sample preparation process is shown together with low energy electron diffraction (LEED), medium energy electron diffraction (MEED), atomic force microscopy (AFM), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD) and transmission electron microscopy (TEM) measurements revealing the samples structure and composition. The crystalline orientation of Pt was imprinted to the magnetic layer stack and clearly influenced the exchangebias (EB) and coercive field (H C ) as shown by superconducting quantum interference device (SQUID) and magneto-optical Kerr effect (MOKE) measurements. Furthermore, a correlation between the crystallite size and the temperature dependent magnetic properties could be identified.

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A new paradigm for exchange bias in polycrystalline thin films

Cited by 426 publications

References 65 publications

Influence of surface roughness and deposition order on exchange bias in bilayer structures NiFe/IrMn

Influence of surface roughness and deposition order on exchange bias in bilayer structures NiFe/IrMn

Atomistic spin model based on a spin-cluster expansion technique: Application to the IrMn3/Co interface

Preparation and characterisation of epitaxial Pt/Cu/FeMn/Co thin films on (100)‐oriented MgO single crystals

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