Investigation on interface of NiFeCr/NiFe/Ta films with high magnetic field sensitivity

Shu, Sheng; Li, Wei; Li, Minghua; Yu, Guo

doi:10.1007/s12598-012-0455-1

Cited by 11 publications

(3 citation statements)

References 13 publications

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“…This leads to a longer mean free path affected by scattering of the conduction band electrons and finally, an elevation of the MR value can be noticed. According to Wang et al the optimum MR ratio value (3.5%) of the seed layer was at ≈5 nm thickness and 400 • C for Ta as the most commonly used seed layer with the Permalloy FM layer [180], whereas the NiFeCr was found as a superior alternative for Ta seed layer [181][182][183][184][185]. Contrary to the Ta seed layer which encounters a thermally preferred interaction between Ta and NiFe leading to a magnetically dead layer and a reduced magnetic moment magnitude, NiFeCr does not experience this interaction.…”

Section: Seed and Capping Layer Effectmentioning

confidence: 99%

Current trends in planar Hall effect sensors: evolution, optimization, and applications

Elzwawy

Pişkin

Akdoğan

et al. 2021

J. Phys. D: Appl. Phys.

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The advantages of planar Hall effect (PHE) sensors-their thermal stability, very low detection limits, and high sensitivities-have supported a wide range of advanced applications such as nano-Tesla (nT) magnetometers, current sensing, or low magnetic moment detection in lab-on-a-chip devices. In this review we outline the background and implications of these PHE sensors, starting from fundamental physics through their technological evolution over the past few decades. Key parameters affecting the performance of these sensors, including noise from different sources, thermal stability, and magnetoresistance magnitudes are discussed. The progression of sensor geometries and junctions from disk, cross-to-bridge, ring, and ellipse configuration is also reviewed. The logical sequence of these structures from single magnetoresistive layers to bi-, tri-layers, and spin-valves is also covered. Research contributions to the development of these sensors are highlighted with a focus on microfluidics and flexible sensorics. This review serves as a comprehensive resource for scientists who wish to use PHE for fundamental research or to develop new applications and devices. The conclusions from this report will benefit the development, production, and performance evaluation of PHE-based devices and microfluidics, as well as set the stage for future advances.

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Section: Seed and Capping Layer Effectmentioning

confidence: 99%

Current trends in planar Hall effect sensors: evolution, optimization, and applications

Elzwawy

Pişkin

Akdoğan

et al. 2021

J. Phys. D: Appl. Phys.

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“…Therefore, the buffer layers are extremely important in determining the properties of flexible magnetic films, such as magnetic anisotropy, coercivity, magnetoresistance, etc. [54] We have investigated the effect of a Ta buffer layer on the magnetic properties of magnetostrictive Fe 81 Ga 19 films grown on flexible PET substrates. [29] As shown in Fig.…”

Section: Effect Of Buffer Layermentioning

confidence: 99%

Fabrication, properties, and applications of flexible magnetic films

Liu

Zhan

2013

Chinese Phys. B

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Flexible magnetic devices, i.e., magnetic devices fabricated on flexible substrates, are very attractive in application of detecting magnetic field in arbitrary surface, non-contact actuators, and microwave devices due to the stretchable, biocompatible, light-weight, portable, and low cost properties. Flexible magnetic films are essential for the realization of various functionalities of flexible magnetic devices. To give a comprehensive understanding for flexible magnetic films and related devices, we have reviewed recent advances in the studies of flexible magnetic films including fabrication methods, magnetic and transport properties of flexible magnetic films, and their applications in magnetic sensors, actuators, and microwave devices. Three typical methods were introduced to prepare the flexible magnetic films.Stretching or bending the flexible magnetic films offers a good way to apply mechanical strain on magnetic films, so that magnetic anisotropy, exchanged bias, coercivity, and magnetoresistance can be effectively manipulated. Finally, a series of examples were shown to demonstrate the great potential of flexible magnetic films for future applications.

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“…Different types of seed layers have been explored in earlier studies, such as Ta, NiFe, Ru, NiCr, and NiFeCr [10][11][12][13][14][15][16][17]. Among them, NiFeCr attracts a great deal of attention.…”

Section: Introductionmentioning

confidence: 99%

Reversal of the Pinning Direction in the Synthetic Spin Valve with a NiFeCr Seed Layer

et al. 2022

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The effect of the seed layers on the magnetic properties of the giant magnetoresistance thin films has received a lot of attention. Here, a synthetic spin valve film stack with a wedge-shaped NiFeCr seed layer is deposited and annealed following a zero-field cooling procedure. The film crystallinity and magnetic properties are studied as a function of the NiFeCr seed layer thickness. It is found that the exchange coupling field from the IrMn/CoFe interface and the antiferromagnetic coupling field in the synthetic antiferromagnet both increase as the seed layer thickness increases, indicating the perfection of film texture. In this film, the critical thickness of the NiFeCr seed layer for the formation of the ordered IrMn3 texture is about 9.3 nm. Meanwhile, a reversal of the pinning direction in the film is observed at this critical thickness of NiFeCr. This phenomenon can be explained in a free energy model by the competition effect between the exchange coupling and the interlayer coupling during the annealing process.

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Investigation on interface of NiFeCr/NiFe/Ta films with high magnetic field sensitivity

Cited by 11 publications

References 13 publications

Current trends in planar Hall effect sensors: evolution, optimization, and applications

Current trends in planar Hall effect sensors: evolution, optimization, and applications

Fabrication, properties, and applications of flexible magnetic films

Reversal of the Pinning Direction in the Synthetic Spin Valve with a NiFeCr Seed Layer

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