Magnetoresistance and Magnetic Anisotropy Properties of Strain-Induced Co/Ag Multilayer Films

Rizal, Conrad; Ueda, Y.

doi:10.1109/tmag.2009.2018588

Cited by 17 publications

(10 citation statements)

References 15 publications

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“…By adjusting the substrate position relative to the direction Manuscript of evaporation, i.e., by adjusting the oblique angle, θ , it is possible to control the position and magnetic orientation in the crystallites, and induce MA in Co/Au multilayers [20]. We previously reported MR and magnetic properties of isotropic and strain-induced anisotropic Co/Cu [21], Co/Ag [22], and Co/Au [9], [23] multilayers, prepared using pulsed-current deposition and e-beam evaporation, with varying Cu, Ag, and Au layer thicknesses at H up to 21 kOe. In this paper, we investigate the effects of Co and Au layer thicknesses, magnetic annealing, and orientations of H and I on MA and MR properties of the anisotropic Co/Au multilayers, prepared using oblique angle deposition, using magnetization, magnetic torque, and MR measurements.…”

Section: Introductionmentioning

confidence: 99%

Magnetic Anisotropy and Magnetoresistance Properties of Co/Au Multilayers

Rizal¹,

Moa²,

Wingert³

et al. 2015

IEEE Trans. Magn.

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We report on the magnetic anisotropy (MA) and magnetoresistance (MR) properties of [Co (t Co )/Au (t Au )] θ N multilayers prepared by changing the incident angle of deposition, θ , thicknesses t Co and t Au of Co and Au layers, respectively, and number of bilayers, N, while keeping N × t Co fixed at 20 nm. Although all of the multilayers showed MAs at low applied magnetic fields, H, and room temperature, the ones deposited at θ = 45°showed remarkable mgnetic anisotropies, which is further enhanced upon magnetic annealing. The [Co (1 nm)/Au (2 nm)] 45 20 multilayer showed a maximum MR of 2.1% at room temperature and H = 1 kOe. Moreover, for the same field H and current I, the transverse (H ⊥ I) MR is always larger than the longitudinal (H I ) MR. Index Terms-Co/Au multilayer, magnetic anisotropy (MA), magnetoresistance (MR), oblique angle deposition. Belaid Moa received the Ph.D. degree in computer science from the University of Victoria, Victoria, BC, Canada, the M.Eng. degree in electronics and signal processing from École Nationale Supérieure d'électronique, d'électrotechnique, d'informatique, d'hydraulique et des Télécommunications, Toulouse, France, and the B.Sc. degree in electrical engineering from École Hassania des Travaux Publics, Casablanca, Morocco.He is currently a Research Computing Staff with Compute , as an Assistant Professor, in 2007, where he became an Associate Professor in 2013. His current research interests include use of synchrotron X-ray sources to study nanoscale structure and dynamics in a wide range of materials systems and devices, from liquids and polymers to magnetic materials, charge density wave systems and battery materials.

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Section: Introductionmentioning

confidence: 99%

Magnetic Anisotropy and Magnetoresistance Properties of Co/Au Multilayers

Rizal¹,

Moa²,

Wingert³

et al. 2015

IEEE Trans. Magn.

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“…These multilayers exhibited strong magnetic anisotropy when the H and are respectively increased from 0 to 20 kOe and 0 to 1.5% [56,59]. The measured MR along the in-plane parallel to the direction of the easy axis and in-plane perpendicular to the direction of the easy axis showed that the peak of the H dependence of the MR for all these multilayers evidently corresponded to the H c , as demonstrated by M-H curves in [8].…”

Section: Giant Magnetoresistance Effectmentioning

confidence: 90%

“…Even today, we still do not know why and how the externally introduced tiny H field, , and defects that are inherently generated as a result of it, can cause such a dramatic change in MR and MA in the FM multilayers [55]. Some of our previous studies have shown that the externally applied , has profound effect on magnetic properties of these kind of FM/NM multilayers and alloys, and in particular, when they are prepared using physical vapor deposition and sputtering techniques [8,40,[55][56][57].…”

Section: Giant Magnetoresistance Effectmentioning

confidence: 99%

“…We demonstrated that the H and have significant effects, especially, in inducing MA in Co/Cu [8], Co/Au [58], and Co/Ag multilayers [8,56]. These were produced on polyimide substrates, by varying the FM layer thickness whereas keeping the NM layer thickness constant.…”

Section: Giant Magnetoresistance Effectmentioning

confidence: 99%

“…Ferromagnetic (FM) multilayered films are important materials because they exhibit interesting physical properties such as giant magnetoresistance (GMR) [1][2][3][4][5][6], magnetic anisotropy (MA) [7][8][9], tunneling magnetoresistance (TMR) [10], surface plasmon-resonance (SPR) and giant magneto-reflectivity (GMRE) [11][12][13][14]. These properties are very sensitive to the microstructure of the multilayered film.…”

Section: Introductionmentioning

confidence: 99%

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Ferromagnetic Multilayers: Magnetoresistance, Magnetic Anisotropy, and Beyond

2016

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Abstract:Obtaining highly sensitive ferromagnetic, FM, and nonmagnetic, NM, multilayers with a large room-temperature magnetoresistance, MR, and strong magnetic anisotropy, MA, under a small externally applied magnetic field, H, remains a subject of scientific and technical interest. Recent advances in nanofabrication and characterization techniques have further opened up several new ways through which MR, sensitivity to H, and MA of the FM/NM multilayers could be dramatically improved in miniature devices such as smart spin-valves based biosensors, non-volatile magnetic random access memory, and spin transfer torque nano-oscillators. This review presents in detail the fabrication and characterization of a few representative FM/NM multilayered films-including the nature and origin of MR, mechanism associated with spin-dependent conductivity and artificial generation of MA. In particular, a special attention is given to the Pulsed-current deposition technique and on the potential industrial applications and future prospects. FM multilayers presented in this review are already used in real-life applications such as magnetic sensors in automobile and computer industries. These material are extremely important as they have the capability to efficiently replace presently used magnetic sensors in automobile, electronics, biophysics, and medicine, among many others.

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Ferromagnetic Resonance Study of Fe/Cu Multilayer Thin Film

Topkaya

2016

J Supercond Nov Magn

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Magnetoresistance and Magnetic Anisotropy Properties of Strain-Induced Co/Ag Multilayer Films

Cited by 17 publications

References 15 publications

Magnetic Anisotropy and Magnetoresistance Properties of Co/Au Multilayers

Magnetic Anisotropy and Magnetoresistance Properties of Co/Au Multilayers

Ferromagnetic Multilayers: Magnetoresistance, Magnetic Anisotropy, and Beyond

Ferromagnetic Resonance Study of Fe/Cu Multilayer Thin Film

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