Time is an important feature in many applications involving events that occur synchronously and/or asynchronously. To effectively consume time information, recent studies have focused on designing new architectures. In this paper, we take an orthogonal but complementary approach by providing a model-agnostic vector representation for time, called Time2Vec, that can be easily imported into many existing and future architectures and improve their performances. We show on a range of models and problems that replacing the notion of time with its Time2Vec representation improves the performance of the final model.

The 17.3 GHz ferromagnetic resonance field (HFMR) and linewidth (ΔH) have been measured as a function of the angle (θH) between the external magnetic field and film normal for a 16 nm thick Co–Cr granular film with uniaxial perpendicular anisotropy. The HFMR(θH) response is significantly different from the uniform rotation prediction. The ΔH(θH) dependence shows major deviations from the Gilbert phenomenological damping model. Both dependences can be modeled simultaneously through a combination of two-magnon scattering processes, inhomogeneity line broadening, and an intrinsic damping from magnon-electron scattering processes, with a Gilbert damping α-value of 0.004.

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A comprehensive study (TEM, MFM, AFM, XRD, Recording Performance and Magnetometry) of media noise mechanisms and their relation to grain structure is reported for model, high noise contrast, CoCrPtTa thin films. The CoCrPtTa media were sputtered on to either CrMn or NiAIKrMn underlayers causing a change in media noise power of 9dB. The changes in media noise are not related to the topography of the underlayer(s) or due to interaction effects, which the 6M technique suggests are negligible in these model samples. A quantitative correlation is obtained between magnetic cluster size and media noise using an analytical first approximation of Zhou and Bertram's micromagnetic model.

The effect of interlayer thickness on the magnetic properties of exchange-coupled composite media has been studied. Films consisting of a CoPtO hard magnetic layer and a CoCrPt soft layer separated by a Pt interlayer with a thickness varying from 0to40Å have been fabricated. At low Pt thicknesses (⩽16Å) the exchange coupling forces the layers to switch as a single unit with a reduction in the hard magnetic layer coercivity of >2.5kOe. Thicker Pt layers induce sufficient decoupling to permit each layer to reverse separately. The variation of the coercivity with Pt thickness is complex and suggests that the coupling between the layers is a combination of dipolar and exchange effects.