Fe-Pt thick-film magnets prepared by electroplating method

Fe-Pt thick-films were electroplated on Ta substrates using a direct current, and the magnetic properties of the film were evaluated. The Fe-Pt films with the thickness from 3 to 23 μm were obtained by changing in the plating time from 2 to 20 min. As the as-plated Fe-Pt films had the disordered fcc (face-centered-cubic) structure and low coercivity (<5 kA/m), we annealed the films at 700 °C for 60 min. The annealing induced the phase transformation from fcc structure to fct (face-centered-tetragonal) one, and we consequently obtained the Fe50Pt50 thick-films with large coercivity of approximately 700 kA/m. The large coercivity was observed in the wide thickness range for our experimental conditions. Therefore, we concluded that our prepared Fe-Pt film is one of the attractive thick-film magnets.

[1]  E. Vallés,et al.  Electrochemical growth of CoPt nanowires of different aspect ratio and their magnetic properties , 2013 .

[2]  M. Nakano,et al.  Magnetic properties of pulsed laser deposition-fabricated isotropic Fe–Pt film magnets , 2011 .

[3]  M. Nakano,et al.  Nd-Fe-B thick film magnets with Nb additive prepared by vacuum arc deposition method , 2011 .

[4]  M. Nakano,et al.  Effect of laser beam parameters on magnetic properties of Nd-Fe-B thick-film magnets fabricated by pulsed laser deposition , 2011 .

[5]  Zongzhi Zhang,et al.  Compositional control of FexPt(1−x) nanowires by electrodeposition , 2011 .

[6]  J. Coey,et al.  Electrodeposition of coercive L10 FePt magnets , 2010 .

[7]  S. Ganesan,et al.  Development of Nanostructured Stress Free Pt-Rich FePt Films for Micro Electro Mechanical System Applications , 2009 .

[8]  M. Nakano,et al.  Change in the direction of anisotropy in PLD-fabricated Sm-Co thick film magnets , 2009 .

[9]  Hongyu Sun,et al.  Microstructure and magnetic behavior of electrodeposited CoPt thick films upon annealing , 2008 .

[10]  L. Schultz,et al.  Electrodeposition and hard magnetic properties of Co–Pt films in comparison to Fe–Pt films , 2007 .

[11]  David Kirkwood,et al.  Electrodeposition of hard magnetic films and microstructures , 2007 .

[12]  P. T. Tang,et al.  Residual stress in Ni–W electrodeposits , 2006 .

[13]  L. Schultz,et al.  Influence of a magnetic field on the morphology of electrodeposited cobalt , 2005 .

[14]  N. Okamoto,et al.  Nanostructured L10 Co-Pt thin films by an electrodeposition process , 2004 .

[15]  L. Schultz,et al.  Highly coercive electrodeposited FePt films by postannealing in hydrogen , 2004 .

[16]  J. Mallett,et al.  Recrystallization texture, epitaxy, and magnetic properties of electrodeposited FePt on Cu(001) , 2004 .

[17]  S. Yoshida,et al.  Preparation of Co–Pt alloy film magnets by electrodeposition , 2004 .

[18]  E. Vallés,et al.  Influence of the bath composition and the pH on the induced cobalt–molybdenum electrodeposition , 2003 .