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

We report the experimental observation of room-temperature perpendicular magnetic anisotropy (PMA) in Ni/Pd (111) multilayer films having the thickness range of 5–11 A Ni and 4–11 A 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 5.6×105 erg/cm3 was obtained for the (5 A Ni/6 A Pd)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.

[1]  Kuiper,et al.  Perpendicular magnetic anisotropy of Co-Au multilayers induced by interface sharpening. , 1988, Physical review letters.

[2]  Wu,et al.  Torque method for the theoretical determination of magnetocrystalline anisotropy. , 1996, Physical review. B, Condensed matter.

[3]  Engel,et al.  Interface magnetic anisotropy in epitaxial superlattices. , 1991, Physical review letters.

[4]  Mt Johnson,et al.  Magnetic anisotropy in metallic multilayers , 1996 .

[5]  Freeman,et al.  Overlayer-induced anomalous interface magnetocrystalline anisotropy in ultrathin Co films. , 1996, Physical review. B, Condensed matter.

[6]  R. Victora,et al.  Calculated magnetic and electronic properties of Co/Pd superlattices , 1991 .

[7]  L. Néel.  Anisotropie magnétique superficielle et surstructures d'orientation , 1954 .

[8]  N. K. Flevaris.  Magneto‐optical properties of Pd‐Ni multilayers , 1991 .

[9]  Sakurai.  Magnetic anisotropy of epitaxial Fe/Pt(001) multilayers. , 1994, Physical review. B, Condensed matter.

[10]  Sung-chul Shin,et al.  Observation of perpendicular magnetic anisotropy in Ni/Pt multilayers at room temperature , 1998 .

[11]  Sung-chul Shin,et al.  In situ stress measurements of Co/Pd multilayer films using an optical non-contact displacement detector , 1995 .

[12]  Sung-chul Shin,et al.  Magnetization and anisotropy of Co/Pd multilayer thin films , 1990 .

[13]  W. J. M. de Jonge,et al.  Magnetic properties and structure of Pd/Co and Pd/Fe multilayers , 1987 .

[14]  Sung-chul Shin.  Co-based multilayer films as novel magneto-optical recording media , 1993 .

[15]  S. Tsunashima,et al.  Magnetic properties of PdNi alloys and multilayers , 1991 .

[16]  Peter Francis Carcia,et al.  Perpendicular magnetic anisotropy in Pd/Co thin film layered structures , 1985 .

[17]  Kirschner,et al.  Magnetic anisotropies and exchange coupling in ultrathin fcc Co(001) structures. , 1991, Physical review. B, Condensed matter.

[18]  Sung-chul Shin,et al.  Origin of room-temperature perpendicular magnetic anisotropy in Ni/Pt multilayers , 1999 .