Origin and properties of an unexpected exchange bias of Ta/Ni80Fe20/Ir20Mn80/Ta heterostructure in ultrathin limit: Impact of the oblique deposition and Ta/Ni80Fe20 alloying

Krohling, A.C.; Leite, H.D.; Fettar, F.; Mossang, E.; Tonnerre, J. M.; Magalhães-Paniago, R.; Bueno, T.E.P.; Passamani, E. C.; Nascimento, V.P.

doi:10.1016/j.tsf.2022.139115

Cited by 5 publications

(2 citation statements)

References 62 publications

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“…The exchange coupling in a ferromagnet/antiferromagnet interface gives rise to the exchange bias (EB) effect, a phenomenon that has been extensively studied in the past few decades [11][12][13][14][15][16][17][18]. From a theoretical perspective, it is challenging to include, in a single model, all the details describing the EB in thin film structure.…”

Section: Introductionmentioning

confidence: 99%

Asymmetric magnetoimpedance in exchange-biased systems

Gazola,

Santos,

de Andrade

et al. 2024

J. Phys.: Condens. Matter

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Magnetic systems with competing anisotropies generally exhibit asymmetry between the maximum amplitudes of the right and left maxima of the magnetoimpedance curve. Small errors in positioning the samples at the experimental setup may also produce such asymmetry. In this work, we present a study on the sources of the asymmetry between magnetoimpedance peaks in systems that present the Exchange Bias phenomenon, by comparing a phenomenological model to experimental data. A set of samples with different repetitions of the NiFe/FeMn exchange-biased bilayer was used in this study. From the frequency evolution of the asymmetry, together with magnetization curves, we were able to identify the sources for the observed magnetoimpedance asymmetry found on our experimental data.

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Section: Introductionmentioning

confidence: 99%

Asymmetric magnetoimpedance in exchange-biased systems

Gazola,

Santos,

de Andrade

et al. 2024

J. Phys.: Condens. Matter

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“…The in-plane easy magnetization axis is oriented perpendicular to the incidence plane of the atoms or clusters of flux if incidence angles are less than 60-70 • [13,14]. Nowadays, the method of oblique deposition is very often used for the deposition of films and multilayers and exchange bias structures with varied effective magnetic anisotropy in each one of the layers [15][16][17][18][19][20][21]. The reason is either to control the magnetotransport properties of granular films or to tune the magneto-optical properties of thin films of pitched columnar type.…”

Section: Introductionmentioning

confidence: 99%

Magnetic Anisotropy of FeNi Multilayer Films with Different Orientations of the Magnetic Anisotropy Axes in Adjacent Layers

Svalov,

Lepalovskij,

Rusalina

et al. 2023

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FeNi films were prepared using the DC magnetron sputtering technique with an oblique deposition arrangement. Multilayers with different orientations of the magnetic anisotropy axes were obtained thanks to a rotary sample holder inside the vacuum chamber. Magnetic properties were studied using magneto–optical Kerr microscopy and a vibrating sample magnetometer. Single-layered FeNi films having thicknesses as high as 10 nm and 40 nm show in-plane uniaxial easy magnetization axes produced by the oblique incidence of incoming components of the beams. Magnetic anisotropy field for four-layered samples with orthogonal uniaxial magnetic anisotropy axes in the adjacent layers and the thickness of individual layers of 10 nm and 40 nm turned out to be less than in single-layered films. The magnetic properties peculiarities of the eight-layered sample FeNi (10 nm) × 8 obtained by rotation of the sample holder by 45° before deposition of each subsequent layer suggest the formation of a helix-like magnetic structure through the thickness of the multilayered sample similar to the magnetization arrangement in the Bloch-type magnetic domain wall.

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