Microstructure and magnetic properties of (001)-oriented L10 FePt films: Role of Ag underlayer and Fe/Pt ratio

Wang, H.; Zhang, Jun; Mo, Qi; Yang, Fujun; Wang, H.B.; Miao, Xiangshui

doi:10.1016/j.materresbull.2012.04.114

Cited by 8 publications

(4 citation statements)

References 19 publications

(23 reference statements)

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“…Newly formed vacancies serve as paths for accelerated diffusion and enhance kinetics of phase transformation. Results of [25] show that the highest coercivity and texture parameter in Ag/[Pt/Fe] 5 /Ag/SiO 2 /Si multilayer compositions belongs to the composition that has 8 nm thick Ag layer . The positive influence of additional Ag layers introduction on FePt films structure ordering has been confirmed in [26], and it was explained by a decrease of activation energy of phase transformation.…”

Section: B Additional Layers Of Agmentioning

confidence: 99%

FePt Thin Films – Prospective Materials for Ultrahigh Density Magnetic Recording

Vladymyrskyi

Oleshkevych

Sidorenko

et al. 2016

JNanoR

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Constant increase of magnetic recording density requires application of modern ferromagnetic materials with high value of magnetic anisotropy constant and coercivity. Thin films on the bases of L10-FePt ordered phase is one of such materials. However, practical application of such materials requires to solve a number of materials science problems such as decrease of ordered phase formation temperature, formation of its predominantly oriented grains and increase of coercivity. Factors that affect structure formation and properties of FePt based films have been examined in this study. A number of modern studies aimed on solving problems mentioned above have been analyzed.

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Section: B Additional Layers Of Agmentioning

confidence: 99%

FePt Thin Films – Prospective Materials for Ultrahigh Density Magnetic Recording

Vladymyrskyi

Oleshkevych

Sidorenko

et al. 2016

JNanoR

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show abstract

“…Fe/Pt/Fe is aligned with (001) crystal direction after annealing at 673 °C [13]. This occurs at 600 °C of annealing temperature in the case of FePt/Ag/SiO2 [9] and at annealing temperature of 550 °C for [FePt/Ag] n multilayers [7]. Moreover, the presence of Ag with deposition at 550 °C leads to the increase in magnetic coercivity up to the order of Tesla [4], but for deposition at high temperature or annealing in Ag presence, there is not any suitable report about nanostructure.…”

Section: Introductionmentioning

confidence: 98%

“…This is the effect on the decline of the obtained grains' size [8]. The other impact of Ag is making crystal direction of nanoparticles aligned, as a thin film on the Ag surface [9,10]. Therefore, the presence of Ag is useful for nanostructural and compound ordering of FePt up to roughly 10% Ag [6].…”

Section: Introductionmentioning

confidence: 99%

Comparing the structural and magnetic properties of FePt/MgO/Si and FePt/Ag/Si granular nanolayers

2019

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The properties of L1 0 -FePt nanoparticles can be improved in the presence of MgO and Ag interlayers in direct sputtering and annealing method, respectively. Such properties are crystal and compound ordering, nanostructure and crystal orientation. In this work, FePt nanoparticles in ferromagnetic L1 0 -fct phase were synthesized using sputtering method on Ag and MgO layers. According to XRD analyses, the impact of the presence of these two kinds of interlayer on crystal structure and its orientation has been investigated. Furthermore, the effect of the presence of 10% Ag on these properties has been studied and their granular layer nanostructures were characterized through the FE-SEM analysis. The results show that the presence of Ag as nanocompound and interlayer is desirable on declining the transition temperature and controlling the size during annealing. The presence of MgO as a sublayer in direct synthesis leads to the formation of 10 nm monosize smaller nanoparticles. According to VSM analysis, MgO and Ag sublayers have increased the magnetic coercivity of the FePt nanoparticles by 3.4 times and 3.7 times, respectively.

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“…This high temperature process is unfavorable in view of the compatibility for a practical device fabrication process. A lot of various attempts have been made to overcome this problem such as (i) the fabrication of Fe/Pt multilayers 6,7 or superlattices, 8 (ii) the use of proper underlayers, [9][10][11] (iii) the addition of a third element into FePt, 12,13 and (iv) the fabrication of a composite granular film including FePt nanoparticles in an oxide matrix. [14][15][16] Rapid thermal annealing (RTA) is also considered as a useful technique to enhance the L1 0 ordering.…”

mentioning

confidence: 99%

Fabrication of highly L1-ordered FePt thin films by low-temperature rapid thermal annealing

et al. 2013

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Highly L10-ordered FePt thin films with a strong (001) texture were successfully fabricated on amorphous substrates simply by co-sputtering and rapid thermal annealing at a low temperature of 400 °C. The morphology of FePt thin films depended strongly on the heating rate, changing from a continuous structure with an atomically flat surface to an island-like structure. The change of the morphology resulted in a drastic increase of coercivity, indicating that the magnetization process could be controlled by the heating condition. This fabrication method of ordered FePt thin films is favorable in view of the compatibility for a practical device fabrication process

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Microstructure and magnetic properties of (001)-oriented L10 FePt films: Role of Ag underlayer and Fe/Pt ratio

Cited by 8 publications

References 19 publications

FePt Thin Films – Prospective Materials for Ultrahigh Density Magnetic Recording

FePt Thin Films – Prospective Materials for Ultrahigh Density Magnetic Recording

Comparing the structural and magnetic properties of FePt/MgO/Si and FePt/Ag/Si granular nanolayers

Fabrication of highly L1-ordered FePt thin films by low-temperature rapid thermal annealing

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