Effects of an external magnetic field on spin waves in finite-length ferromagnetic nanotubes

Magneto-structural properties of rhombohedral Ni and Ni–B nanotubes deposited by electroless-plating in track-etched mica templates

“…The room temperature hysteresis loops displayed in Fig. 6 This journal is © The Royal Society of Chemistry 2023 reduced remanence (19)(20)(21)(22)(23)(24)(25)(26)(27)(28)(29)(30)(31)(32)(33)(34)(35)(36) Oe and 8-18%, respectively). A clearly defined triaxial anisotropic behavior, consistent with the predominant contribution of shape anisotropy, is found in this sample.…”

“…The unique 3-fold magnetic anisotropy observed in our rhomboidal nanotubes entails an additional freedom degree for tailoring the complex magnetic response of this nanostructured system, thus opening the door for novel applications in emerging fields such as in subwavelength waveguiding, 54,57 magnetocalorics, 77,78 drug delivery, [79][80][81] and three-dimensional nanomagnetism. 7,8,[25][26][27][28][29][30][31][32][33][34]47,82…”

“…These advantages range from the availability of an empty core that can be functionalized or filled for drug delivery and related biomedical applications 15,16 to the possibility of independently controlling the tube diameter and wall thickness, which allows one to select the magnetization reversal process that can occur in coherent, transverse and vortex modes, 3,5,[17][18][19][20][21][22][23][24] thus being a promising building block for three-dimensional nanomagnetism with potential applications in spin-wave spintronics. 8,[25][26][27][28][29][30][31][32][33][34][35] Different synthesis strategies have been employed for the fabrication of magnetic nanotubes. Among them, templateassisted deposition techniques, such as electrochemical deposition, 3,6,22,36,37 atomic layer deposition, 4,5,16,20,21,38,39 and electroless-plating stand out.…”

“…These advantages range from the availability of an empty core that can be functionalized or filled for drug delivery and related biomedical applications 15,16 to the possibility of independently controlling the tube diameter and wall thickness, which allows one to select the magnetization reversal process that can occur in coherent, transverse and vortex modes, 3,5,17–24 thus being a promising building block for three-dimensional nanomagnetism with potential applications in spin-wave spintronics. 8,25–35…”

Dynamic susceptibility of Fe3O4 nanotubes

“…Da Silva et al [ 12 , 13 ] have investigated the dynamic properties of hollow square nanopillars. Also, the spin wave spectra associated with a confined vortex domain wall within a nanotube has been calculated [ 14 ] as well as the nonreciprocity of spin waves in magnetic nanotubes with helical equilibrium magnetization [ 15 ] and the effects of an external magnetic field on the spin waves of a finite nanotube [ 16 ]. Fel'k et al [ 17 ] investigated the ferromagnetic resonance of a nickel microtube, Yong et al [ 18 ] investigated the microwave electromagnetic and absorption properties of hollow nanostructures, while Saavedra et al had already reported the dynamic susceptibility of curved nanotubes [ 19 ] and wire-tube nanostructures [ 20 ].…”