Magnetic properties of 3d, 4d, and 5d transition-metal atomic monolayers in Fe/TM/Fe sandwiches: Systematic first-principles study

Snarski-Adamski, Justyn; Rychły, Justyna; Werwiński, Mirosław

doi:10.1016/j.jmmm.2021.168828

Cited by 8 publications

(1 citation statement)

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“…Experimentally obtained L1 0 FePt thin films are usually not continuous but granular, which provides an additional degree of freedom that can be controlled to improve the desired properties and achieve dedicated patterned surface films [20]. The main factor distinguishing FePt films from other materials is it possesses one of the highest coercivity values [35]. For example, Takahashi et al obtained a huge coercivity of 42 kOe (4.2 T) for FePt films with a thickness of 10 nm [21].…”

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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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%