Room-temperature perpendicular magnetic anisotropy in Ni/Pd (111) multilayers

Abstract

We report the experimental observation of room-temperature perpendicular magnetic anisotropy ͑PMA͒ in Ni/Pd ͑111͒ multilayer films having the thickness range of 5-11 Å Ni and 4-11 Å Pd sublayers, prepared by direct current magnetron sputtering on glass substrates at Ar sputtering pressure of 7 mTorr. Perpendicular magnetic anisotropy was found to be sensitively dependent on both Ni-and Pd-sublayer thicknesses, and a maximum anisotropy energy of 5.6ϫ10 5 erg/cm 3 was obtained for the ͑5 Å Ni/6 Å Pd͒ 30 multilayer. The magnetoelastic anisotropy, quantitatively determined from in situ stress and ex situ magnetostriction coefficient measurements, was found to play an important role for the observed PMA in this system, together with the surface anisotropy.

Impact of a rubrene buffer layer on the dynamic magnetic behavior of nickel layers on Si(100)

“…The estimated anisotropy values are within a comparable magnitude (∼10 5 erg cm −3 ) for various Ni layer anisotropy contributions found in the literature citations. 20,25,66–68 The typical magnetic anisotropy of bulk Ni reported in ref. 68 was 4.5 × 10 4 erg cm −3 , which is in the same order of magnitude for K 1 of Ni( x )/Si but is lower than the K 1 values for the Ni( x )/rubrene/Si bilayers.…”

“…20,25,66–68 The typical magnetic anisotropy of bulk Ni reported in ref. 68 was 4.5 × 10 4 erg cm −3 , which is in the same order of magnitude for K 1 of Ni( x )/Si but is lower than the K 1 values for the Ni( x )/rubrene/Si bilayers. On the other hand, the values of Ni( x )/rubrene/Si bilayers are suppressed as compared to , whereas the values of Ni( x )/rubrene/Si bilayers are much larger as compared to the values of Ni( x )/Si.…”

Effects of PS–PVP diblock copolymer topography on the magnetic properties of CoCrPt thin films

“…The volume anisotropy is, in general, composed of the magnetocrystalline anisotropy, the magnetoelastic anisotropy, and the shape anisotropy. In most magnetic thin films the surface anisotropy plays a major role to yield perpendicular spin orientation [11,12]. The shape anisotropy of magnetic thin films, caused by the magnetic dipolar interaction, energetically favours in-plane magnetization, and therefore it contributes negatively to perpendicular magnetic anisotropy.…”

Saturation magnetostriction coefficient measurement of CoCrPt alloy thin films using a highly sensitive optical deflection-detecting system

“…In the study of high-density magnetic recording media, it is essential to characterize the magnetoelastic properties since it could provide a way to control the spin orientation and to stabilize magnetic anisotropy in magnetic devices. [1][2][3][4][5][6] It is well known that the saturation magnetostriction coefficient is one of the most important parameters for evaluating the magnetoelastic properties of ultrathin magnetic films. Especially, it is used to investigate the contribution of the magnetoelastic effect on the magnetic anisotropy.…”