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Rhee, Joo Yull; Kudryavtsev, Y. V.; Lee, Y. P.

doi:10.1103/physrevb.68.045104

Cited by 17 publications

(18 citation statements)

References 30 publications

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“…While the stoichiometric alloy has T C = 40 K, already 2% higher Ni content almost doubles this value [22,23]. The value found for Ni 3+δ Al 1−δ with δ = 0.084 is within the error bar identical with our T C 1 [24]. We thus attribute the first magnetic phase transition of our substrate to a slightly Ni enriched near surface region of the crystal that is at least as thick as the MOKE probing depth of 20-30 nm [35,36].…”

Section: A Substrate Magnetism and Ni Surface Enrichmentsupporting

confidence: 86%

“…The coexistence of two such systems has been suggested for the surface of a Ni 3+δ Al 1−δ bulk alloy with δ = 0.084 that exhibited, as in the present case, two Curie temperatures, both very close to our values [24]. The first has been attributed to the weak itinerant ferromagnetism of the Ni 3 Al bulk alloy [22,23] and the second to Ni clusters embedded into this alloy [24].…”

Section: A Substrate Magnetism and Ni Surface Enrichmentsupporting

confidence: 83%

“…The first has been attributed to the weak itinerant ferromagnetism of the Ni 3 Al bulk alloy [22,23] and the second to Ni clusters embedded into this alloy [24].…”

Section: A Substrate Magnetism and Ni Surface Enrichmentmentioning

confidence: 99%

“…The second plateau with much higher T C either stems from a very thin and strongly Ni enriched layer located directly at the Ni 3 Al/vacuum, respectively, Ni 3 Al/Al 2 O 3 interface, or from pure Ni clusters embedded into the alloy and distributed over the MOKE probing depth [24]. Although the first interpretation is supported by T C 2 being close to that of a 2 ML Ni thin film on Cu(111) [37], we prefer the second, proposed in Ref.…”

Section: A Substrate Magnetism and Ni Surface Enrichmentmentioning

confidence: 99%

“…Nevertheless it has to be noticed that the substrate magnetism can also play a role, influencing the magnetic behavior of the nanoparticles. In fact, Ni 3 Al(111) is a weak itinerant ferromagnet whose magnetic properties strongly depend on its exact chemical composition [22][23][24]. Moreover the high temperature oxidation of the surface, through which the ultrathin Al 2 O 3 layer is formed, involves an increase of the Ni concentration below the surface due to the Al incorporation into the oxide [25].…”

Section: Introductionmentioning

confidence: 99%

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Interlayer exchange coupling in ordered Fe nanocluster arrays grown onAl2O3/Ni3Al(111)

et al. 2014

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We have combined magneto-optical Kerr effect, scanning tunneling microscopy, and x-ray magnetic circular dichroism to study the magnetic properties and the morphology of Fe nanoparticles grown on 2 ML thick Al 2 O 3 /Ni 3 Al (111) (111) substrate is ferromagnetic and shows two transition temperatures. The first, T C 1 = 81 ± 3 K, is attributed to a 20-30 nm thick slightly Ni enriched region; the second, T C 2 = 240 ± 12 K, is attributed to a much thinner and more strongly Ni enriched near interface region that contains Ni clusters embedded in the alloy matrix. The magnetic properties of the Fe cluster superlattice are strongly influenced by the superexchange coupling between Fe clusters and the underlying Ni clusters in that near interface region. Since the Ni clusters are at different distances from the oxide/metal interface, this coupling oscillates between ferro-and antiferromagnetic such that the overall magnetic moment is not increased by the Fe clusters. Pd seeding does not influence the magnetic properties of the system. The intrinsic Fe cluster properties, such as Curie temperature and easy magnetization axis, are accessed for T > T C 2 . We find out-of-plane easy magnetization axes and T C ≈ 300 K for cluster sizes above 440 atoms.

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Section: A Substrate Magnetism and Ni Surface Enrichmentsupporting

confidence: 86%

Section: A Substrate Magnetism and Ni Surface Enrichmentsupporting

confidence: 83%

“…The first has been attributed to the weak itinerant ferromagnetism of the Ni 3 Al bulk alloy [22,23] and the second to Ni clusters embedded into this alloy [24].…”

Section: A Substrate Magnetism and Ni Surface Enrichmentmentioning

confidence: 99%

Section: A Substrate Magnetism and Ni Surface Enrichmentmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Interlayer exchange coupling in ordered Fe nanocluster arrays grown onAl2O3/Ni3Al(111)

et al. 2014

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Approximating PageRank from In-Degree

Fortunato

Boguñá

Flammini

et al.

Algorithms and Models for the Web-Graph

125

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PageRank has become a key element in the success of search engines, allowing to rank the most important hits in the top screen of results. One key aspect that distinguishes PageRank from other prestige measures such as in-degree is its global nature. From the information provider perspective, this makes it difficult or impossible to predict how their pages will be ranked. Consequently a market has emerged for the optimization of search engine results. Here we study the accuracy with which PageRank can be approximated by in-degree, a local measure made freely available by search engines. Theoretical and empirical analyses lead to conclude that given the weak degree correlations in the Web link graph, the approximation can be relatively accurate, giving service and information providers an effective new marketing tool.

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Comparison of electron binding energies in Ni3Al, Al, and Ni determined by X-ray photoelectron spectroscopy and quantum-mechanical calculation

Vorob'ev

Добышева

Drozdov

et al. 2021

Journal of Electron Spectroscopy and Related Phenomena

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Optical, magneto-optical, and magnetic properties of stoichiometric and off-stoichiometricγ′−phase

Cited by 17 publications

References 30 publications

Interlayer exchange coupling in ordered Fe nanocluster arrays grown onAl2O3/Ni3Al(111)

Interlayer exchange coupling in ordered Fe nanocluster arrays grown onAl2O3/Ni3Al(111)

Approximating PageRank from In-Degree

Comparison of electron binding energies in Ni3Al, Al, and Ni determined by X-ray photoelectron spectroscopy and quantum-mechanical calculation

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