Efficient model for field-induced magnetization and magnetostriction of Galfenol

A fully coupled, nonlinear model is presented that characterizes the three-dimensional (3D) strain and magnetization response to magnetic field at constant stress in cubic magnetostrictive materials. A multiscale thermodynamic approach is taken which accounts for nonlinear anisotropy, material texture, and hysteresis effects. The model is validated with measurements of textured polycrystalline Galfenol. The model provides an efficient framework for characterization, design, and control of Galfenol (Fe–Ga) devices with 3D functionality subjected to combined magnetic field and stress loading.

[1]  Alison B. Flatau,et al.  Comprehensive three dimensional hysteretic magnetomechanical model and its validation with experimental ⟨110⟩ single-crystal iron-gallium behavior , 2008 .

[2]  J. Atulasimha,et al.  Modeling of magnetostrictive Galfenol sensor and validation using four point bending test , 2007 .

[3]  Alison B. Flatau,et al.  Characterization and energy-based model of the magnetomechanical behavior of polycrystalline iron–gallium alloys , 2007 .

[4]  C. Appino,et al.  A vector hysteresis model including domain wall motion and coherent rotation , 2000 .

[5]  B. Phelps,et al.  Macroscopic models of magnetization , 2000 .

[6]  Manfred Wuttig,et al.  Magnetic anisotropy of FeGa alloys , 2004 .

[7]  E. Summers,et al.  Integration of Thin-Film Galfenol with MEMS Cantilevers for Magnetic Actuation , 2006, INTERMAG 2006 - IEEE International Magnetics Conference.

[8]  William D. Armstrong,et al.  An incremental theory of magneto-elastic hysteresis in pseudo-cubic ferro-magnetostrictive alloys , 2003 .

[9]  David Jiles,et al.  Theoretical modelling of the effects of anisotropy and stress on the magnetization and magnetostriction of Tb0.3Dy0.7Fe2 , 1994 .

[10]  John S. Baras,et al.  Modeling and control of hysteresis in magnetostrictive actuators , 2004, Autom..

[11]  Eric Summers,et al.  Magnetic and mechanical properties of polycrystalline Galfenol , 2004, SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring.

[12]  Alison B. Flatau,et al.  Structural magnetic strain model for magnetostrictive transducers , 2000 .

[13]  C. Kittel,et al.  Physical Theory of Ferromagnetic Domains , 1949 .

[14]  Alison B. Flatau,et al.  Quasi-static Transduction Characterization of Galfenol , 2005 .