Effect of annealing on the structural and magnetic properties of giant magnetostrictive multilayers

Petit, F.; Youssef, J. Ben; Teillet, J.; Dekadjevi, D. T.

doi:10.1016/j.jmmm.2004.11.389

Cited by 5 publications

(3 citation statements)

References 7 publications

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“…Petit [ 47 ] investigated the relationship between the formation of a rough surface by an annealing process at different temperatures. His research shows an annealing process for the structure of the GMR layer Fe/Cr at temperatures greater than 425 °C will reduce the magnetic resistance of the structure by 25% and the quality of the surface layer of the structure is increased.…”

Section: The Influence Of Various Parameters On the Gmr Measuremenmentioning

confidence: 99%

Giant Magnetoresistance Sensors: A Review on Structures and Non-Destructive Eddy Current Testing Applications

Rifai

Abdalla

Ali

et al. 2016

Sensors

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Non-destructive eddy current testing (ECT) is widely used to examine structural defects in ferromagnetic pipe in the oil and gas industry. Implementation of giant magnetoresistance (GMR) sensors as magnetic field sensors to detect the changes of magnetic field continuity have increased the sensitivity of eddy current techniques in detecting the material defect profile. However, not many researchers have described in detail the structure and issues of GMR sensors and their application in eddy current techniques for nondestructive testing. This paper will describe the implementation of GMR sensors in non-destructive testing eddy current testing. The first part of this paper will describe the structure and principles of GMR sensors. The second part outlines the principles and types of eddy current testing probe that have been studied and developed by previous researchers. The influence of various parameters on the GMR measurement and a factor affecting in eddy current testing will be described in detail in the third part of this paper. Finally, this paper will discuss the limitations of coil probe and compensation techniques that researchers have applied in eddy current testing probes. A comprehensive review of previous studies on the application of GMR sensors in non-destructive eddy current testing also be given at the end of this paper.

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Section: The Influence Of Various Parameters On the Gmr Measuremenmentioning

confidence: 99%

Giant Magnetoresistance Sensors: A Review on Structures and Non-Destructive Eddy Current Testing Applications

Rifai

Abdalla

Ali

et al. 2016

Sensors

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“…Besides, Jiang and Zhang [10] reported that the strong internal stress in multilayers would induce a small anisotropic distortion of atomic arrangement and finally affect the macro-magnetic anisotropy of multilayers. Petit et al [11] and Zhou Luo [12] also reported that the SmFe 2 layer was amorphous and the Fe layer was polycrystalline in the as-deposited SmFe 2 /Fe multilayers fabricated by sputtering deposition; as annealing temperature increased, the crystallization progresses can be divided into three stages: amorphous-amorphousþmicrocrystalline-nano-polycrystalline. Because of the strong internal stress and rough surface morphologies, coercive force of the as-deposited SmFe 2 /Fe multilayers was large.…”

Section: Soft-magnetic Property Of Smfe 2 Series Filmsmentioning

confidence: 99%

Magnetic properties and static–dynamic magnetostrictive characteristics for SmFe2/Fe exchange-coupled multilayers

Zhou

Lei

Chen

et al. 2011

Journal of Magnetism and Magnetic Materials

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“…Reports showed that magnetron sputtering (MS) was the most common method for the fabrication of RE-GMFs [4][5][6][7], while IBSD was rarely used [8,9]. However, as known to us, giant magnetostrictive thin films prepared by IBSD method have plenty of merits like precisely controllable of thickness and composition and well adhesion between film and substrate.…”

Section: Introductionmentioning

confidence: 99%

Effects of Vacuum Annealing on Microstructure and Magnetostriction of TbDy-Fe GMFs

Zhou

Luo

Chen

2010

AMR

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In this study, TbDy-Fe giant magnetostrictive thin films were firstly prepared by ion beam sputtering deposition (IBSD) method on water-cooled substrates, and then the films were annealed at different temperatures under vacuum condition. An Inductively Coupled Plasma Spectrometry, Scanning Electron Microscope (SEM), Scanning Probe Microscope (SPM), and Transmission Electron Microscope (TEM) were used to investigate the surface morphology and microstructure for TbDy-Fe GMFs. Besides, DWS type Ultra-precision Displacement Meter was used for measuring magnetostriction coefficient of the films by cantilever method. The results showed that TbDy-Fe GMFs of compact amorphous microstructure, smooth surface morphology, and high interfacial adhesion had been deposited under the fixed fabrication procedure. Moreover, as annealing temperature increased, microstructure of the films had been changed as following order: amorphous → amorphous + microcrystalline → nano-polycrystalline (crystallization temperature was about 400 ). It was noted that magnetostriction of TbDy-Fe GMFs could be drastically improved, particularly for low magnetic field magnetostriction sensitivity when annealed at about 400 (the value of λ was about 500ppm at 200KA•m-1).

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Effect of annealing on the structural and magnetic properties of giant magnetostrictive multilayers

Cited by 5 publications

References 7 publications

Giant Magnetoresistance Sensors: A Review on Structures and Non-Destructive Eddy Current Testing Applications

Giant Magnetoresistance Sensors: A Review on Structures and Non-Destructive Eddy Current Testing Applications

Magnetic properties and static–dynamic magnetostrictive characteristics for SmFe2/Fe exchange-coupled multilayers

Effects of Vacuum Annealing on Microstructure and Magnetostriction of TbDy-Fe GMFs

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