Coercivity and induced magnetic anisotropy by stress and/or field annealing in Fe- and Co- based ( Finemet-type) amorphous alloys

Uniaxial magnetic anisotropy has been induced in amorphous Fe 73.5 Cu 1 Nb 3 Si 15.5 B 7 (Fe-rich) and (Co 77 Si 13.5 B 9.5 ) 90- Fe 7 Nb 3 (Co-rich) ferromagnetic alloys by annealing under stress and/or magnetic field. Such anisotropy plays a crucial role on the magnetization process and, consequently, determine the future applications of these materials. The mechanisms involved on the origin of such induced magnetic anisotropy showed significant differences between Fe-rich and Co-rich amorphous alloys. This work provides a comparative study of the coercive field and induced magnetic anisotropy in Fe-rich and Co-rich (Finemet) amorphous alloys treated by stress and/or field.

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

[2]  K. Kułakowski,et al.  Stress and field induced magnetic anisotropies in Co-rich amorphous alloys , 1989 .

[3]  A. Hernando,et al.  Magnetic anisotropy in (Fe, Co)75Si15B10 and (Fe0.11Co0.89)72Mo3Si15B10 metallic glass ribbons, induced by constant stress and constant strain annealing , 1983 .

[4]  A. R. Pierna,et al.  Compositional dependence of the stress plus field induced anisotropy in CoNiSiB and CoFeNiSiB amorphous alloy ribbons , 1991 .

[5]  G. Herzer.  Creep induced magnetic anisotropy in nanocrystalline Fe-Cu-Nb-Si-B alloys , 1994 .

[6]  H. Lachowicz,et al.  On the origin of stress-anneal-induced anisotropy in Finemet-type nanocrystalline magnets , 1997 .

[7]  J. Blanco,et al.  Short range order of FeCo and FeNi amorphous alloys from stress and/or field induced magnetic anisotropy☆ , 1990 .

[8]  A. Hernando,et al.  Magnetic anisotropies induced by current annealing and their dependence on annealing temperature , 1989 .

[9]  G. Herzer.  Magnetic field-induced anisotropy in nanocrystalline Fe-Cu-Nb-Si-B alloys , 1994 .

[10]  A. Hernando,et al.  Induced magnetic anisotropy and change of the magnetostriction by current annealing in Co-based amorphous alloys , 1986 .

[11]  Arcady Zhukov,et al.  Stress and/or Field Induced Magnetic Anisotropy in the Amorphous Fe73.5Cu1Nb3Si15.5B7 Alloy: Influence on the Coercivity, Saturation Magnetostriction and Magneto‐Impedance Response , 2002 .

[12]  M. Vázquez,et al.  Stress induced anisotropy and temperature dependence of the magnetostriction in Fe73.5Cu1Nb3Si13.5B9 amorphous alloy , 1993 .

[13]  A. Hernando,et al.  Experiments concerning the origin of stress anneal induced magnetic anisotropy in metallic glass ribbons , 1985 .

[14]  J. González,et al.  Effect of stress and/or field annealing on the magnetic behavior of the (Co77Si13.5B9.5)90Fe7Nb3 amorphous alloy , 2005 .

[15]  B. Hofmann,et al.  Stress-induced magnetic anisotropy in nanocrystalline FeCuNbSiB alloy , 1996 .

[16]  R. O'handley.  Magnetostriction of transition-metal-metalloid glasses: Temperature dependence , 1978 .

[17]  J. Porteseil,et al.  Scaling properties of irreversible magnetization and their consequences on the macroscopic behaviour of soft materials , 1994 .

[18]  F. Luborsky,et al.  Magnetic anneal anisotropy in amorphous alloys , 1977 .

[19]  A. Hernando.  Magnetic properties and spin disorder in nanocrystalline materials , 1999 .

[20]  Minoru Takahashi,et al.  Magnetic Annealing Effect of Amorphous (Fe1-xCox)77Si10B13 Alloys , 1978 .

[21]  Y. Yoshizawa,et al.  New Fe-based soft magnetic alloys composed of ultrafine grain structure , 1988 .

[22]  A. Hernando,et al.  Short range order in (Fe, Co, Ni)75Si15B10 amorphous alloys determined from magnetic anisotropy , 1985 .

[23]  B. A. Calhoun,et al.  Ferromagnetic materials , 1955 .

[24]  Suzuki,et al.  Bond-orientational anisotropy in metallic glasses observed by x-ray diffraction. , 1987, Physical review. B, Condensed matter.