Large change in perpendicular magnetic anisotropy induced by an electric field in FePd ultrathin films

The magnetic properties of FePd ultrathin films and their variation under the influence of an electric field are investigated by magneto-optical Kerr effect (MOKE) measurements. L10-ordered FePd shows a spin reorientation transition when varying the thickness. The easy axis of magnetization is found to be normal to the plane at thicknesses above 9 monolayers (MLs) and in-plane below 9 ML. The coercive field, the perpendicular magnetic anisotropy and the MOKE signal at saturation vary with the applied electric field. The sensitivity of the interface magnetic anisotropy is estimated to be 602 fJ/V m.

[1]  A. Marty,et al.  Electric Field-Induced Modification of Magnetism in Thin-Film Ferromagnets , 2007, Science.

[2]  S. Yuasa,et al.  Giant room-temperature magnetoresistance in single-crystal Fe/MgO/Fe magnetic tunnel junctions , 2004, Nature materials.

[3]  Masashi Shiraishi,et al.  Voltage-induced perpendicular magnetic anisotropy change in magnetic tunnel junctions , 2010 .

[4]  H. Ohno.  A window on the future of spintronics. , 2010, Nature Materials.

[5]  E. Fullerton,et al.  Electric-field modification of magnetism in a thin CoPd film , 2010 .

[6]  A. Tulapurkar,et al.  Large voltage-induced magnetic anisotropy change in a few atomic layers of iron. , 2009, Nature nanotechnology.

[7]  A. Marty,et al.  Magnetic susceptibility and magnetic domain configuration as a function of the layer thickness in epitaxial FePd(0 0 1) thin films ordered in the L1o structure , 1997 .

[8]  T. Oda,et al.  Electric-field effects on magnetic anisotropy in Pd/Fe/Pd(0 0 1) surface , 2011 .

[9]  T. Oda,et al.  Finite electric field effects in the large perpendicular magnetic anisotropy surface Pt/Fe/Pt(001): a first-principles study. , 2009, Physical review letters.

[10]  R. Lukaszew,et al.  Control of the perpendicular magnetic anisotropy of FePd films via Pd capping deposition , 2008 .

[11]  A. Fert,et al.  The emergence of spin electronics in data storage. , 2007, Nature materials.

[12]  Junhao Chu,et al.  Surface magnetoelectric effect in ferromagnetic metal films. , 2008, Physical review letters.

[13]  A. Marty,et al.  L10 ordering at different stages of Fe0.5Pd0.5 epitaxial growth , 2002 .

[14]  Yoshishige Suzuki,et al.  Quantitative Evaluation of Voltage-Induced Magnetic Anisotropy Change by Magnetoresistance Measurement , 2011 .

[15]  Masashi Shiraishi,et al.  Voltage-Assisted Magnetization Switching in Ultrathin Fe80Co20 Alloy Layers , 2009 .

[16]  A. Panchula,et al.  Giant tunnelling magnetoresistance at room temperature with MgO (100) tunnel barriers , 2004, Nature materials.

[17]  A. Freeman,et al.  Giant modification of the magnetocrystalline anisotropy in transition-metal monolayers by an external electric field. , 2009, Physical review letters.

[18]  Hideo Ohno,et al.  Electric-field effects on thickness dependent magnetic anisotropy of sputtered MgO/Co40Fe40B20/Ta structures , 2010 .

[19]  P. Oppeneer.  Chapter 3 Magneto-optical kerr spectra , 2001 .

[20]  T. Zhou,et al.  Manipulation of magnetism by electrical field in a real recording system , 2010 .