Soft magnetism, magnetostriction, and microwave properties of FeGaB thin films

A series of (Fe100−yGay)1−xBx (x=0–21 and y=9–17) films were deposited; their microstructure, soft magnetism, magnetostrictive behavior, and microwave properties were investigated. The addition of B changes the FeGaB films from polycrystalline to amorphous phase and leads to excellent magnetic softness with coercivity <1Oe, high 4πMs, self-biased ferromagnetic resonance (FMR) frequency of 1.85GHz, narrow FMR linewidth (X band) of 16–20Oe, and a high saturation magnetostriction constant of 70ppm. The combination of these properties makes the FeGaB films potential candidates for tunable magnetoelectric microwave devices and other rf/microwave magnetic device applications.

[1]  A. Inoue,et al.  Magnetostriction of Fe-Ga-B Alloys in Amorphous and Crystallized States , 2004 .

[2]  James Weston,et al.  Growth and magnetic characterization of epitaxial Fe81Ga19∕MgO (100) thin films , 2005 .

[3]  M. Munakata,et al.  B-concentration dependence on anisotropy field of CoFeB thin film for gigahertz frequency use , 2005, IEEE Transactions on Magnetics.

[4]  C. Platt,et al.  Magnetic and structural properties of FeCoB thin films , 2001 .

[5]  S. Dong,et al.  Ultrahigh magnetic field sensitivity in laminates of TERFENOL-D and Pb(Mg1/3Nb2/3)O3–PbTiO3 crystals , 2003 .

[6]  Gopalan Srinivasan,et al.  Ferrite-ferroelectric hybrid wave phase shifters , 2007 .

[7]  T. Silva,et al.  Different dynamic and static magnetic anisotropy in thin Permalloy™ films , 2003 .

[8]  Göran Engdahl,et al.  Chapter 2 – Modeling of Giant Magnetostrictive Materials , 2000 .

[9]  T. Lograsso,et al.  Effect of quenching on the magnetostriction on Fe/sub 1-x/Ga/sub x/ (0.13x<0.21) , 2001 .

[10]  K. Arai,et al.  Magnetostriction of ribbon‐form amorphous and crystalline ferromagnetic alloys , 1979 .

[11]  Marilyn Wun-Fogle,et al.  Magnetostrictive properties of body-centered cubic Fe-Ga and Fe-Ga-Al alloys , 2000 .

[12]  Sivaraman Guruswamy,et al.  Large magnetostriction in directionally solidified FeGa and FeGaAl alloys , 2001 .

[13]  S. Dong,et al.  Vortex magnetic field sensor based on ring-type magnetoelectric laminate , 2004 .

[14]  I. A. Kornev,et al.  Theory of magnetoelectric effects at microwave frequencies in a piezoelectric/magnetostrictive multilayer composite , 2001 .

[15]  Marilyn Wun-Fogle,et al.  Magnetostrictive Properties of Galfenol Alloys Under Compressive Stress , 2002 .

[16]  Shuxiang Dong,et al.  Longitudinal and transverse magnetoelectric voltage coefficients of magnetostrictive/piezoelectric laminate composite: theory , 2003, IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control.

[17]  Y. Shimada,et al.  Crystal structure and magnetic softness of Fe‐Si polycrystalline films , 1990 .

[18]  M. Yamaguchi,et al.  Effects of boron contents on magnetic properties of Fe-Co-B thin films , 2004, IEEE transactions on magnetics.

[19]  G. Engdahl.  Handbook of Giant Magnetostrictive Materials , 1999 .

[20]  Marilyn Wun-Fogle,et al.  Magnetostriction of ternary Fe–Ga–X (X=C,V,Cr,Mn,Co,Rh) alloys , 2007 .