Magnetic-environment model of Ni-Pt and Ni-Pd alloys

Parra, R. E.; Medina, R.

doi:10.1103/physrevb.22.5460

Cited by 40 publications

(20 citation statements)

References 34 publications

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“…Pt acquires a relatively large moment of 0.17-0.29 B /atom ͑depending on Ni thickness͒ at the interface. Comparing our data to ab initio theoretical calculations and previous element-specific data recorded for NiPt alloys by neutron diffuse scattering methods [12][13][14] it is possible to conclude about the effect of interdiffusion on the magnetic moments in Ni/Pt multilayers. Moreover, the ab initio calculations support the previously reported SQUID data 4 showing that it is possible to find enhanced magnetization per Ni volume by a suitable choice of the individual Ni and Pt thicknesses.…”

Section: Introductionsupporting

confidence: 64%

“…5 we show Ni and Pt magnetic moments recorded in our work ͑solid͒ and previous elementspecific measurements for NiPt alloys ͑open symbols͒. [12][13][14] The bottom axis is in units of ML of Ni in each multilayer period in a series with mϭ5 ML and it refers only to multilayers. The top axis is calibrated in average Ni composition in at.…”

Section: B Effects Of Interface Alloying On the Magnetic Moments Of mentioning

confidence: 82%

“…Although not considered in the Ni/Pt multilayer literature, Pt induced magnetic moments in NiPt alloys have been known for more than 20 years. [12][13][14] The magnetic moment of Pt at the interface may be as large as 0.29 B /atom for 2 ML of Pt sandwiched between 6 ML of Ni. This value agrees within 5% with the higher induced Pt moments reported for Ni-rich NiPt alloys.…”

Section: A Element-specific Magnetic Moments For Ni and Ptmentioning

confidence: 99%

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X-ray magnetic circular dichroic magnetometry on Ni/Pt multilayers

Poulopoulos

Wilhelm

Wende

et al. 2001

Journal of Applied Physics

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Articles you may be interested inElectronic structure of Fe/MgO/Fe multilayer stack by X-ray magnetic circular dichroism J. Appl. Phys. 115, 17C109 (2014); 10.1063/1.4862380 X-ray absorption and magnetic circular dichroism of graphene/Ni (111) Application of the x-ray magnetic circular dichroism sum rules to Co/Pt multilayers (abstract) X-ray magnetic circular dichroism measurements have been performed on Ni/Pt multilayers at a temperature of 10 K. The element specificity and shell selectivity of the technique allows us to probe Ni and Pt magnetic moments and to separate them into their constituent spin ( S ) and orbital ( L ) magnetic moments. The Ni magnetic moment at the interface is found to be reduced. However, magnetically ''dead'' Ni layers are unambiguously ruled out. Induced Pt magnetic moments up to about 0.3 B /atom are reported. The results are compared to ab initio calculations and to previous experiments performed on NiPt alloys. The role of intermixing in the reduction of the Ni magnetic moments is also discussed.

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Section: Introductionsupporting

confidence: 64%

Section: B Effects Of Interface Alloying On the Magnetic Moments Of mentioning

confidence: 82%

Section: A Element-specific Magnetic Moments For Ni and Ptmentioning

confidence: 99%

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X-ray magnetic circular dichroic magnetometry on Ni/Pt multilayers

Poulopoulos

Wilhelm

Wende

et al. 2001

Journal of Applied Physics

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“…Earlier work [5,6] on the magnetic properties of Ni-Pd and Ni-Pt alloys used parametrized local environment models to describe the magnetism in Ni-Pd and Ni-Pt alloys. The local environment models incorporated the changes induced due to the chemical environment as well as the magnetic environment.…”

Section: Introductionmentioning

confidence: 99%

Relativity and magnetism in Ni–Pd and Ni–Pt alloys

Singh

2003

Journal of Magnetism and Magnetic Materials

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We show that the differences in the magnetic properties of Ni-Pd and Ni-Pt alloys arise mainly due to relativity. In particular, we find that the local magnetic moment of Ni increases with the addition of Pd in Ni-Pd while it decreases with the addition of Pt in Ni-Pt, as found experimentally, only if relativity is present. Our analysis is based on the effects of relativity on (i) the spin-polarized densities of states of Ni, (ii) the splitting of majority and minority spin d-band centers of Ni, and (iii) the separation between s-d band centers of Pd and Pt in Ni-Pd and Ni-Pt alloys.

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“…% Ni. 18 While surface alloying is a common observation in systems of this type over the formation of a compact layer, our measure- FIG. 4.…”

mentioning

confidence: 99%

Site exchange in ultrathin layers of Ni on Cu(100) studied with element-specific layer-by-layer resolution

2003

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We use medium-energy ion scattering to determine the composition of each of the topmost three atomic layers of a single crystal of copper coated with an epitaxial submonolayer of nickel as a function of anneal temperature in the range 140-420 K. The technique confers layer and elemental resolution even though the constituents are adjacent in the Periodic Table. At a transition temperature of around 300 K, subsurface copper and surface nickel interchange so that the nickel comes to reside almost exclusively in the subsurface layer, and the top layer of the crystal becomes almost purely copper. Implications of the result for magnetic measurements are briefly sketched.

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Magnetic-environment model of Ni-Pt and Ni-Pd alloys

Cited by 40 publications

References 34 publications

X-ray magnetic circular dichroic magnetometry on Ni/Pt multilayers

X-ray magnetic circular dichroic magnetometry on Ni/Pt multilayers

Relativity and magnetism in Ni–Pd and Ni–Pt alloys

Site exchange in ultrathin layers of Ni on Cu(100) studied with element-specific layer-by-layer resolution

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