Magnetoresistance effect of Co/Cu multilayer film produced by electrodeposition method

Ueda, Y.; Hataya, N.; Zaman, H.

doi:10.1016/0304-8853(95)00894-2

Cited by 36 publications

(12 citation statements)

References 7 publications

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“…Pulsed-current electrodeposition is one of the preferred electrochemical methods in which magnetic alloys can be grown via reducing the reaction of metal ions from a single electrolyte [28]- [32]. It has many merits over non-aqueous deposition methods.…”

Section: Introductionmentioning

confidence: 99%

Magnetotransport Properties of Co-Au Granular Alloys

Rizal¹,

Ueda²,

Pokharel³

2011

IJAPM

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Abstract-A series of Cox-Au1-x granular alloys was grown using pulsed-current electrodeposition on polyimide substrates. The relationship between the giant magnetoresistance effect, saturation magnetization, and grain size was examined as the deposition current density and annealing temperatures were changed. A maximum magnetoresistance (MR) ratio of 4.5 % was obtained. The magnetization and ferromagnetic grain size of the as-deposited and annealed alloy films were examined against the deposition current density. The saturation magnetization decreased as the composition of Au was increased for both the alloys deposited at the current densities of 1 and 5 mA/cm2. The total magnetic moment further decreased on annealing. The grain size is found to be highly influenced by both the deposition current density and temperature. A low temperature magnetization measurement suggested that the ferromagnetic grain size decreases with increase in current densities. For the annealed samples, the ferromagnetic grain sizes were found to be dispersed in the Au matrix with different diameters. The decrease in magnetic moments with annealing is correlated with the grain size of the Co and its distribution in the gold matrix. The MR ratio increased with the increase in the deposition current density as a result of the formation of smaller grain size at higher deposition current densities.

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Section: Introductionmentioning

confidence: 99%

Magnetotransport Properties of Co-Au Granular Alloys

Rizal¹,

Ueda²,

Pokharel³

2011

IJAPM

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“…Though the electrodeposition is not by no means easy to find a suitable condition for deposition, it has a significance as a useful means to prepare the nano-ordered thin films, even if the suitable deposition condition could be established successfully. Furthermore, it becomes a very useful method for the development of the research in nano-ordered multilayered films with the combination of ferromagnetic and non-magnetic layers, which shows the giant magnetoresistance effect [1][2][3]. It is possible to control the film composition, thickness of multilayer and grain size in an atomic order by regulating the pulse amplitude and width [4][5][6][7].…”

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confidence: 99%

Magnetic properties and magnetoresistance effect in Co/Au, Ag nano‐structure films produced by pulse electrodeposition

Rizal

Yamada

Hori

et al. 2004

phys. stat. sol. (c)

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We have investigated the relationship between the magnetism and the magnetoresistance effect in the Co/Au, Ag multilayer films with layers produced in the atomic level by pulse electrodeposition method. The magnetoresistance effect is dependent on both the thickness of Co ferromagnetic layer and Ag,Au non-magnetic layers. The magnetization of these films shows the minimum value against the Ag and Au layer thickness. The Ag and Au layer thickness showing the maximum of MR ratio is not of necessary in agreement with the Ag and Au layer thickness showing the minimum of magnetization. Antiparallel alignment of magnetic spin is a necessary but not sufficient condition in order to generate the GMR of multilayer films. For the Co/Au multilayer films, the Au layer thickness showing the minimum of the magnetization shifts to higher side of the Au layer thickness. IntroductionThe studies on the physical properties of the nano-ordered multilayer films have attracted much attention not only in the fundamental physics, but also in electronic engineering. The productions of multilayered films have been attempted actively by the several methods. Though the electrodeposition is not by no means easy to find a suitable condition for deposition, it has a significance as a useful means to prepare the nano-ordered thin films, even if the suitable deposition condition could be established successfully. Furthermore, it becomes a very useful method for the development of the research in nano-ordered multilayered films with the combination of ferromagnetic and non-magnetic layers, which shows the giant magnetoresistance effect [1][2][3]. It is possible to control the film composition, thickness of multilayer and grain size in an atomic order by regulating the pulse amplitude and width [4][5][6][7]. If the pulse width of deposition time to produce multilayers is reduced to very small values, the multilayer film with layers of two different atomic compositions eventually results in a binary alloy of solid solution type mixed in the atomic level.In this present work, we have investigated the relationship between magnetism and magnetoresistance effect in the Co/Au, Ag films with layers produced in the atomic level by pulse electrodeposition method.

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“…Magnetic and magnetotransport properties are so sensitive to their special interface and surface microstructures that metastable phases and solid solutions have been regarded highly in recent researches [9][10][11][12][13]. For example, Ueda et al [9] observed that an fcc structure for the full range of composition in the electrodeposited Co-Ag multilayers and granular films and no Co-Ag solid solutions formed, while Co-Cu solid solutions were obtained in the Co-Cu films.…”

Section: Introductionmentioning

confidence: 96%