Experimental and theoretical study of quantized spin-wave modes in micrometer-size permalloy wires

Microwave magnetic dynamics in ferromagnetic metallic nanostructures lacking inversion symmetry

“…The theoretical understanding of the magnetization dynamics in single-layer [23,37] and bi-layer [24,25,27,41,42,45] stripes with rectangular cross-section has been well established. As already mentioned in Introduction, the single-layer stripes are characterized by a number of standing spin wave resonances across the stripe width [23].…”

“…Strongly exchange-coupled (a A 12 ≅A 1 ,A 2, where a is the size of the crystal unit cell) and completely exchangeuncoupled bilayer stripes (A 12 =0) behave differently. For any strength of the exchange coupling through the interface, the standing spin wave resonances separate in two families of modes: the acoustic and the optical resonances [24,25]. For the acoustic resonances the magnetization vector precesses in-phase for both layers and for the optic mode there is a difference of π between the phases of the precession.…”

“…Once the physics of the magnetisation precession on the single-layer stripes had been established, the interest shifted to multilayered stripes [24][25][26][27]30,41,42]. In parallel, drastic improvement of techniques of creating nanopatterned films made of ferromagnetic metals [43] made it possible to fabricate large arrays of nanostripes with sophisticated cross-sections [44].…”

“…[1][2][3][4][5][6][7][8][9][10][11][12]). These materials are important for the emerging fields of magnonics [13], microwave spintronics [14][15][16][17], and for novel sensor applications [18][19][20][21].Macroscopically-long stripes with sub-micron cross-section made of ferromagnetic materials have attracted a lot of attention, because this geometry is a very convenient model object for studying the impact of geometric confinement on magnetization dynamics on the sub-micrometre and nanometer scales [22][23][24][25][26][27][28][29][30]. The main reasons for the attractiveness of this geometry are the practical absence of a static demagnetizing field H ds when the external field is applied along the stripes (i.e.…”

The effect of a neighboring metal layer on the high-frequency characteristics of a thin magnetic stripe

“…[1][2][3][4][5][6][7] Such studies are particularly important in view of the potential application of FM elements in magnetic data storage and microwave devices. [8][9][10][11] In many cases, however, magnetic elements do not stand alone, but are ͑par-tially͒ surrounded by metallic conductors.…”