Nanocrystalline iron nitride films with perpendicular magnetic anisotropy

The magnetic properties of an iron nitride thin film obtained by ion implantation have been investigated. N[Formula: see text] ions were implanted in a pristine iron layer epitaxially grown on ZnSe/GaAs(001). X-ray diffraction measurements revealed the formation of body-centered tetragonal N-martensite whose [Formula: see text]-axis is perpendicular to the thin film plane and [Formula: see text]-parameter is close to that of [Formula: see text]-Fe8N. Magnetic measurements disclosed a weak perpendicular magnetic anisotropy (PMA) whose energy density [Formula: see text] was assessed to about 105[Formula: see text]J/m3. A sharp decline of the in-plane magnetocrystalline anisotropy (MCA) was also observed, in comparison with the body-centered cubic iron. The origin of the PMA is attributed to the MCA of N-martensite and/or stress-induced anisotropy. As a result of the PMA, weak magnetic stripe domains with a period of about 130[Formula: see text]nm aligned along the last saturating magnetic field direction were observed at remanence by magnetic force microscopy. The application of an increasing in-plane magnetic field transverse to the stripes [Formula: see text] highlighted a threshold value ([Formula: see text][Formula: see text]T) above which these magnetic domains irreversibly rotated. Interestingly, below this threshold, the stripes do not rotate, leading to a zero remanent magnetization along the direction of the applied field. The interest of this system for magnetization dynamics is discussed.

Download Full-text

Корреляция электрических, гальваномагнитных и магнитных характеристик нанокристаллических пленок железа, полученных методом ионно-ассистированного осаждения

Физика твердого тела ◽

10.21883/ftt.2021.12.51670.163 ◽

2021 ◽

Vol 63 (12) ◽

pp. 2096

Author(s):

В.И. Головчук ◽

Ю.А. Бумай ◽

М.Г. Лукашевич ◽

Н.М. Лядов ◽

И.А. Файзрахманов ◽

...

Keyword(s):

Magnetic Field ◽

External Magnetic Field ◽

Magnetic Anisotropy ◽

Ion Beam ◽

Perpendicular Magnetic Anisotropy ◽

Film Plane ◽

Iron Films ◽

Saturation Field ◽

Nanocrystalline Iron ◽

The Magnetic Field

Here we present the measurements of the temperature dependence of resistance, transverse and longitudinal magnetoresistance (MR) in nanocrystalline iron films in the temperature range 2-300 K and the sweep of the magnetic field up to 8 T. Thin nanocrystalline films of α- iron phase with 80 nm thickness were obtained by ion-beam assisted deposition on a silicon substrate. In addition to the shape anisotropy, the obtained iron films exhibited perpendicular magnetic anisotropy (PMA), which disappeared after annealing the films at a temperature of 450 oC in a vacuum. The effect of PMA on the sign and magnitude of the MR of iron films, as well as on the magnetic field dependences of the magnetoresistive effect, recorded at different orientations of the external magnetic field with respect to the film plane and current direction, is experimentally shown. The results obtained are discussed in the framework of modern views on the processes of charge transfer in a weakly disordered ferromagnetic films with different magnetic anisotropy and domain structure when a weak (less than the saturation field of magnetization) or strong (higher than the saturation field) external magnetic field is applied.

Download Full-text

TEM Study of Co/Pd and Co/Au Multilayers

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100151015 ◽

1993 ◽

Vol 51 ◽

pp. 1036-1037

Author(s):

A.E.M. De Veirman ◽

F.J.G. Hakkens ◽

W.M.J. Coene ◽

F.J.A. den Broeder

Keyword(s):

Magnetic Anisotropy ◽

Ion Beam ◽

Perpendicular Magnetic Anisotropy ◽

Optical Recording ◽

Magnetic Multilayer ◽

Ion Beam Sputtering ◽

Cross Sectional ◽

Transmission Electron ◽

Beam Sputtering ◽

Substrate Temperatures

There is currently great interest in magnetic multilayer (ML) thin films (see e.g.), because they display some interesting magnetic properties. Co/Pd and Co/Au ML systems exhibit perpendicular magnetic anisotropy below certain Co layer thicknesses, which makes them candidates for applications in the field of magneto-optical recording. It has been found that the magnetic anisotropy of a particular system strongly depends on the preparation method (vapour deposition, sputtering, ion beam sputtering) as well as on the substrate, underlayer and deposition temperature. In order to get a better understanding of the correlation between microstructure and properties a thorough cross-sectional transmission electron microscopy (XTEM) study of vapour deposited Co/Pd and Co/Au (111) MLs was undertaken (for more detailed results see ref.).The Co/Pd films (with fixed Pd thickness of 2.2 nm) were deposited on mica substrates at substrate temperatures Ts of 20°C and 200°C, after prior deposition of a 100 nm Pd underlayer at 450°C.

Download Full-text

Effects of ion irradiation on epitaxial Cu/Ni/Cu(001) with perpendicular magnetic anisotropy

Applied Physics Letters ◽

10.1063/1.1515877 ◽

2002 ◽

Vol 81 (21) ◽

pp. 4017-4019 ◽

Cited By ~ 12

Author(s):

T. G. Kim ◽

Y. H. Shin ◽

J. H. Song ◽

M. C. Sung ◽

I. S. Kim ◽

...

Keyword(s):

Magnetic Anisotropy ◽

Ion Irradiation ◽

Perpendicular Magnetic Anisotropy

Download Full-text

Interfacial Dzyaloshinskii-Moriya Interaction, Perpendicular Magnetic Anisotropy and damping in CoFeB/oxide-based systems

IEEE Transactions on Magnetics ◽

10.1109/tmag.2021.3088995 ◽

2021 ◽

pp. 1-1

Author(s):

I. Benguettat-El Mokhtari ◽

Y. Roussigne ◽

S. M. Cherif ◽

S. Auffret ◽

C. Baraduc ◽

...

Keyword(s):

Magnetic Anisotropy ◽

Perpendicular Magnetic Anisotropy ◽

Moriya Interaction

Download Full-text

Local structure and magnetism of L10-type FeNi alloy films with perpendicular magnetic anisotropy studied through57Fe nuclear probes

Journal of Physics D Applied Physics ◽

10.1088/0022-3727/48/20/205002 ◽

2015 ◽

Vol 48 (20) ◽

pp. 205002 ◽

Cited By ~ 7

Author(s):

K Mibu ◽

T Kojima ◽

M Mizuguchi ◽

K Takanashi

Keyword(s):

Magnetic Anisotropy ◽

Local Structure ◽

Perpendicular Magnetic Anisotropy ◽

Alloy Films ◽

Feni Alloy

Download Full-text

Buffer layer engineering of L10 FePd thin films with large perpendicular magnetic anisotropy

AIP Advances ◽

10.1063/5.0033287 ◽

2021 ◽

Vol 11 (2) ◽

pp. 025106

Author(s):

Xinjun Wang ◽

Sergiy Krylyuk ◽

Daniel Josell ◽

Delin Zhang ◽

Deyuan Lyu ◽

...

Keyword(s):

Thin Films ◽

Magnetic Anisotropy ◽

Buffer Layer ◽

Perpendicular Magnetic Anisotropy

Download Full-text

The influence of an ultra-high resistivity Ta underlayer on perpendicular magnetic anisotropy in Ta/Pt/Co/Pt heterostructures

RSC Advances ◽

10.1039/d0ra00459f ◽

2020 ◽

Vol 10 (19) ◽

pp. 11219-11224

Author(s):

Wei Zhang ◽

Xiaoxiong Jia ◽

Rui Wang ◽

Huihui Liu ◽

Zhengyu Xiao ◽

...

Keyword(s):

Thin Films ◽

Thermal Stability ◽

Magnetic Anisotropy ◽

High Stability ◽

Essential Role ◽

Perpendicular Magnetic Anisotropy ◽

Low Energy ◽

High Resistivity ◽

Excellent Thermal Stability ◽

Low Energy Consumption

Thin films with perpendicular magnetic anisotropy (PMA) play an essential role in the development of technologies due to their excellent thermal stability and potential application in devices with high density, high stability, and low energy consumption.

Download Full-text