Underlayer-induced perpendicular magnetic anisotropy in ultrathin Co/Au/Cu(111) films: A spin-wave Brillouin-scattering study

Murayama, Akihiro; Hyomi, K.; Eickmann, James; Falco, Charles M.

doi:10.1103/physrevb.58.8596

Cited by 32 publications

(25 citation statements)

References 28 publications

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“…The spacing between them corresponds to the nearest neighbours distance of 2.62 Å in the close packed layer, which is between bulk values equal to 2.51 Å and 2.88 Å for Co and Au respectively. This observation shows that Co layer is strained as also reported in [4]. After annealing at 250 °C for 20 min the streaks clearly split into double ones corresponding to 2.56 Å and 2.86 Å -much closer to the bulk values of Co and Au, respectively (Fig.…”

Section: Resultssupporting

confidence: 61%

“…Various deposition techniques of nominally the same systems result in their entirely different properties [2,3]. There is also no consensus if -due to large lattice mismatch equal to 14% -the presence of interface induces strains in constituent layers leading in consequence to magnetoelastic contribution to PMA [4,5]. Recently we have studied in details a spin reorientation transition in Au/Co sandwiches as a function of magnetic layer thickness modified by various types of cover layers [6].…”

Section: Introductionmentioning

confidence: 97%

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Structure and magnetic anisotropy evolution in Au/Co/Au sandwiches upon thermal treatment

Wawro

Kurant

Baczewski

et al. 2006

Phys. Status Solidi (c)

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The correlation between structural and magnetic properties of Au(111)/Co(0001)/Au(111) sandwiches with perpendicular magnetic anisotropy, grown by molecular beam epitaxy, has been studied in details. Thermal treatment in the range between room temperature and 300 °C at various stages of samples growth process as well as after its completion is applied as a factor modifying the structure of studied specimens. Annealing at 150 °C does not affect substantially either crystalline structure or perpendicular magnetic anisotropy. At 250 °C the RHEED pattern of Co layers reveals the loss of the lattice coherence with Au underlayer and the analysis of synchrotron radiation reflectometry leads to the conclusion that the continuity of Co layers is lost. Structural evolution upon thermal treatment is well correlated with changes of magnetic anisotropy studied by magnetooptical Kerr effect. After annealing at 250 °C magnetization switches from out-of-plane to in-plane orientation, which is explained in terms of interfacial and magnetoelastic contributions to the sample magnetic anisotropy.

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Section: Resultssupporting

confidence: 61%

Section: Introductionmentioning

confidence: 97%

Structure and magnetic anisotropy evolution in Au/Co/Au sandwiches upon thermal treatment

Wawro

Kurant

Baczewski

et al. 2006

Phys. Status Solidi (c)

View full text Add to dashboard Cite

show abstract

“…To provide further insight into our results, we calculated the free energy of the SRT system using the ¿rst two terms of the anisotropy 26 using the temperature dependence of Ms(T) for a two-dimensional system was 27 along with the measured value of K 1 (T ) and K 2 (T). 28,29 Fig. 4 illustrates the free energy as a function of angle for several temperatures near T SRT .…”

Section: Figmentioning

confidence: 99%

Final Technical Progress Report NANOSTRUCTURED MAGNETIC MATERIALS

Falco¹

2012

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“…During the past decade, it was not only sputter-deposited Au/Co multilayered films with large perpendicular magnetic anisotropy properties that attracted great attention [56][57][58][59][60], but also Au-Co alloys, the so-called hard gold material with low cobalt content, which are recognized as important alloys because of their high resistance. These structures have a wide applicability in plating electrical contacts in printed circuit board technology [61][62][63].…”

Section: Template Synthesis Of 2 Nm Au/4 Nm Co Multilayered Nanowire mentioning

confidence: 99%

Template Synthesis of Magnetic Nanowire Arrays

Valizadeh

Strömberg

Strömme

2008

Nanostructured Materials in Electrochemistry

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IntroductionDuring the late 20th century, the growing interest in creating advanced materials using nanoscaled building blocks was employed to develop synthetic techniques for re-engineering existing materials to novel functional materials such as quantum dots, nanodots, nanorods, nanotubes, nanofibrils and quantum wires. These nanowires can act as one-dimensional conductors with interesting electronic and optical properties. Moreover, nanowires may find applications in ultrasensitive chemical and biological sensors.To date, a physical vapor deposition (PVD) technique followed by lithography is usually considered to represent the ultimate method for producing nanoscaled materials. Although a number of successful efforts have been reported on the fabrication of freestanding nanopillars or nanowells using lithographic techniques, there is a whole range of potential obstacles for these approaches. These arise mainly from the fact that, when the technologies are pushed to smaller sizes, the cost rapidly escalate and the tolerances are more difficult to maintain. The lithographic processes used to pattern nanoelectronic structures also currently limit the dimensions of the electronic components such as nanowires. Optical lithography is limited by the wavelength of the light used to produce the wires. Consequently, the wavelength of light used is moving into the deeper regions of the ultraviolet (UV) spectrum, and the cost of fabricating optical components to achieve this is expected to rise at an astronomic rate. These challenges have forced many to seek new nanofabrication techniques, especially those which grow nanostructures directly in the openings of a template. One of the most successful approaches to these nanofabrication methods is known as the membrane-based synthesis of nanomaterials [1][2][3][4], where the membrane acts as a template for the electrodeposition of multilayered nanowires, as well as for single metallic nanowires [5,6]. The advantage of using template synthesis of nanowires is that it can be considered as an alternative solution to overcome the difficulty in fabricating fibrils with very small diameters by lithographic methods [7].

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Underlayer-induced perpendicular magnetic anisotropy in ultrathin Co/Au/Cu(111) films: A spin-wave Brillouin-scattering study

Cited by 32 publications

References 28 publications

Structure and magnetic anisotropy evolution in Au/Co/Au sandwiches upon thermal treatment

Structure and magnetic anisotropy evolution in Au/Co/Au sandwiches upon thermal treatment

Final Technical Progress Report NANOSTRUCTURED MAGNETIC MATERIALS

Template Synthesis of Magnetic Nanowire Arrays

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