Exchange Bias in fcc-CoPt/CoO/Si films as a function of annealing treatment

Laureti, S.; Agostinelli, E.; Fiorani, D.; Generosi, Amanda; Paci, Barbara; Albertini, V. Rossi; Testa, A. M.; Varvaro, G.

doi:10.1016/j.spmi.2009.01.007

Cited by 4 publications

(7 citation statements)

References 10 publications

(13 reference statements)

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“…As reported in Ref. [20], the annealing treatment caused the growth of the AFM clusters and enhanced their anisotropy, which resulted in an improvement of exchange coupling. Also according to Ref.…”

supporting

confidence: 57%

“…Also according to Ref. [20], if increasing the annealing temperature to 600 ∘ C for 2 h, a Co 3 O 4 phase forms, which will weaken the strength of exchange coupling dramatically. Another experiment carried out by our colleagues also proved this.…”

mentioning

confidence: 89%

“…When implantation dose increased, more CoO clusters formed and their size also enlarged, the latter reason is regarded to enhancement of the anisotropy of the AFM CoO cluster. [20] Many research works. [21−23] established the importance of the AFM anisotropy in the two-dimensional system, the exchange coupling energy 𝐽 FM−AFM , which refers the strength of reaction between FM and AFM interface, is proportional to the thickness of AFM layer, i.e.…”

mentioning

confidence: 99%

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Fabrication of Co/CoO Exchange Bias System by Ion Implantation and Its Magnetic Properties

Fa¹,

Qian²,

Shu-De³

2009

Chinese Phys. Lett.

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We use ion implantation as a new approach to build an anti-ferromagnetic (AFM) cluster embedded exchange bias (EB) system. Co film with thickness of 130 nm is deposited on the Si (111) substrate using magnetron sputtering, 60keV O+ is chosen to implanted into the Co film to form CoO AFM clusters coupling with Co matrix at the interface. By measuring the hysteresis loop after field-cooling, significant shifts of loop along the applied field are confirmed. When increasing the implantation dose to 2 × 1017/cm2 and annealed samples in N2 atmosphere, we obtain the highest HEB to 458 Oe.

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supporting

confidence: 57%

mentioning

confidence: 89%

mentioning

confidence: 99%

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Fabrication of Co/CoO Exchange Bias System by Ion Implantation and Its Magnetic Properties

Fa¹,

Qian²,

Shu-De³

2009

Chinese Phys. Lett.

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“…Then, a strict control over the growth mechanism and deposition parameters is of crucial importance, although the possibility of varying the interface roughness without introducing other variables always represents a great challenge. In [94], the exchange coupling at the CoPt/CoO interface have been modulated by thermal treatments on the CoO antiferromagnetic layer in order to investigate their influence on the magnetic behavior of the system. To this purpose, an fcc CoPt layer was pulsed laser deposited on top of a CoO underlayer and, prior to CoPt deposition, a thermal annealing at the AFM layer for 60′ at 600 °C have been performed.…”

Section: Roughnessmentioning

confidence: 99%

The role of chemical and microstructural inhomogeneities on interface magnetism

et al. 2021

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The study of interfacing effects arising when different magnetic phases are in close contact has led to the discovery of novel physical properties and the development of innovative technological applications of nanostructured magnetic materials. Chemical and microstructural inhomogeneities at the interfacial region, driven by interdiffusion processes, chemical reactions and interface roughness may significantly affect the final properties of a material and, if suitably controlled, may represent an additional tool to finely tune the overall physical properties. The activity at the Nanostructured Magnetic Materials Laboratory (nM2-Lab) at CNR-ISM of Italy is aimed at designing and investigating nanoscale-engineered magnetic materials, where the overall magnetic properties are dominated by the interface exchange coupling. In this review, some examples of recent studies where the chemical and microstructural properties are critical in determining the overall magnetic properties in core/shell nanoparticles, nanocomposites and multilayer heterostructures are presented.

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“…Moreover, the laser source is outside the vacuum chamber, and this provides a much larger flexibility in the choice of the material as a target, the geometrical arrangements, and the variation of the deposition parameters. Thanks to the congruent removal of the target constituents, PLD has been widely used to deposit complex metal oxide films, such as high-Tc superconductors, hexaferrites, and multiferroics. , Furthermore, in the last few decades, this technique has been successfully exploited for the growth of metallic thin films and multilayers, − paving the way for a simpler process to fabricate a new class of advanced multifunctional films and heterostructures (i.e., ferroelectric/ferromagnetic materials) where complex oxides and metallic alloys are properly combined.…”

Section: Introductionmentioning

confidence: 99%

Highly Textured FeCo Thin Films Deposited by Low Temperature Pulsed Laser Deposition

Varvaro

Peddis

Barucca

et al. 2015

ACS Appl. Mater. Interfaces

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The effect of the deposition temperature (Tdep) on the crystallographic orientation of pulsed laser-deposited FeCo/MgO(100) thin film was determined by means of X-ray reflectivity and high resolution trasmission electron microscopy analysis and was correlated with the magnetic anisotropy properties measured by angle dependent hysteresis loops. Highly textured films with a bcc structure and very smooth surface were obtained even at room temperature, the film being [100] and [110] oriented, at Tdep=25 °C and 150 °C, respectively. The cubic symmetry is reflected in the angular dependence of remanent magnetization, showing a 4-fold character, whose in-plane distribution is consistent with the different crystallographic orientations of the films. The high structural quality, even at room temperature, is reflected in a high value of the saturation magnetization and low coercivity, matching the requirements for technological applications.

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Exchange Bias in fcc-CoPt/CoO/Si films as a function of annealing treatment

Cited by 4 publications

References 10 publications

Fabrication of Co/CoO Exchange Bias System by Ion Implantation and Its Magnetic Properties

Fabrication of Co/CoO Exchange Bias System by Ion Implantation and Its Magnetic Properties

The role of chemical and microstructural inhomogeneities on interface magnetism

Highly Textured FeCo Thin Films Deposited by Low Temperature Pulsed Laser Deposition

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