Experimental Determination of the Orientation of Tilted Magnetic Anisotropy by Using Angle-Resolved Hall Effect Signals

Pişkin, Hasan; Demirci, E.; Öztürk, Mustafa Kemal; Akdoğan, N.

doi:10.1007/s10948-021-05853-7

Cited by 3 publications

(3 citation statements)

References 47 publications

(52 reference statements)

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“…Since then, several other ways of achieving a film with tilted magnetization have been considered, such as ferromagnetic coupling of a tilted top Co layer with an in-plane magnetized bottom Co layer [38]. Much attention has been paid in particular to L1 0 FePt and CoPt films [32,39], which can be deposited on the substrate in such a way that the unique tetragonal axis is strongly deviated from the plane of the film, as in the case of the growth of the FePt films with a (111) surface [33,34,40,41]. The L1 0 FePt (111) films in the aforementioned experiments have a thickness of 20 to 60 nm.…”

Section: Introductionmentioning

confidence: 99%

“…FePt (111) films were also used in experimental pseudo spin valves [40], indicating a noticeable magnetoresistance, followed by a theoretical analysis of a spin valve with conical magnetization [43]. To directly measure angles of tilted magnetic anisotropy, Pişkin et al proposed a new experimental method using anomalous and planar Hall effects together and called it angleresolved Hall effect signals (ARHES) [39].…”

Section: Introductionmentioning

confidence: 99%

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L1$_0$ FePt thin films with tilted and in-plane magnetic anisotropy: first-principles study

Marciniak¹,

Werwiński²

2023

Preprint

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Ultrathin L10 FePt films with different c-axis orientations relative to the film plane are promising candidates for data storage materials. In this work, within the framework of density functional theory, we calculated the magnetic properties of ultrathin L10 FePt (111) and (010) films with thicknesses ranging from 4 to 16 atomic monolayers (from about 0.8 to 3.5 nm). The highest average magnetic moments are observed for the thinnest films considered, and with increasing film thickness, the values converge towards the magnetic moment for bulk. The observed increase comes mainly from enhanced moments in the two atomic monolayers closest to the surface of the films. The easy axis of magnetization of (111) films prefers an alignment close to the tetragonal axis, an example of tilted magnetic anisotropy. The 6-monolayer ( 111) film (about 1.3 nm thick) inclines the easy axis of magnetization of about 45°to the film plane, which can find use in applications. The (010) films show an in-plane easy magnetization axis in a unique L10 tetragonal direction. This is an unusual type of in-plane anisotropy, as the particular direction preference is very strong. The computational results encourage further experimental studies of L10 systems with tilted and in-plane fixed magnetic anisotropy.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

L1$_0$ FePt thin films with tilted and in-plane magnetic anisotropy: first-principles study

Marciniak¹,

Werwiński²

2023

Preprint

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“…There exist other works that focus on non-contact anisotropy measurement, and are therefore more suitable for in-line process measurement. The dynamic response of the magnetic layers can be measured by using eddy current sensors [9,10], magnetic sensors [11], and ferromagnetic resonance (FMR) [6]. Doirat et al [9] observed the magnetic response of anisotropic metal fiber material by using a ferrite core eddy current sensor together with an impedance analyzer.…”

Section: Introductionmentioning

confidence: 99%

Eddy Current Sensor System for Tilting Independent In-Process Measurement of Magnetic Anisotropy

Wendler

Munjal

Waqas

et al. 2021

Sensors

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Modern production equipment is based on the results of quality control as well as process parameters. The magnetic anisotropy of materials is closely connected to internal mechanical stress by the Villari effect, and also to hardening effects due to plastic deformations, and could therefore provide an interesting basis for process control. Nevertheless, the analysis of anisotropic properties is extremely sensitive to sensor and workpiece misalignments, such as tilting. In this work, a novel eddy current sensor system is introduced, performing a non-contact measurement of the magnetic anisotropy of a workpiece and realizing a separation and correction of tilting effects. The measurement principle is demonstrated with the example of two samples with different magnetic anisotropy values induced by cold forming. Both samples are analyzed under different tilt angles between the sensor axis and the surface of the workpiece. In this work, digital signal processing is demonstrated on the acquired raw data in order to differentiate the effects of tilt and of anisotropy, with the use of preliminary results as an example of two prepared samples.

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L10 FePt thin films with tilted and in-plane magnetic anisotropy: A first-principles study

Marciniak,

Werwiński

2023

Phys. Rev. B

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Experimental Determination of the Orientation of Tilted Magnetic Anisotropy by Using Angle-Resolved Hall Effect Signals

Cited by 3 publications

References 47 publications

L1$_0$ FePt thin films with tilted and in-plane magnetic anisotropy: first-principles study

L1$_0$ FePt thin films with tilted and in-plane magnetic anisotropy: first-principles study

Eddy Current Sensor System for Tilting Independent In-Process Measurement of Magnetic Anisotropy

L10 FePt thin films with tilted and in-plane magnetic anisotropy: A first-principles study

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