David I. Paul

Senior Lecturer

AB Physics, UCLA
MS Physics, UCLA
PhD Physics, UCLA

Room 13-5030, 77 Mass. Ave., Cambridge, MA  02139
617-253-3306 (phone) 617-258-7874 (fax)
dipaul@mit.edu

Prof. Paul is an international authority on the properties of magnetic materials and their application to high technology. He has done research in practically all of the subfields of magnetic materials including 
a. hard magnetic materials such as the rare earth CoSm series, 
b. soft amorphous materials such as the FePB type,
c. small particulates such as found in magnetic tape, and
d. ferromagnetic shape memory alloys.

He has applied his knowledge of the dynamics of the magnetization process to the design of magnetic recording heads, the analyses of magnetic recording media, and to numerous applications in the design and development of high technology components and systems. He has published fundamental papers on the nature of the coercivity of magnetic materials and the dynamics of the magnetization process. 

Selected Publications 

"Ferromagnetic Shape Memory Alloys: A theoretical approach," D.I.Paul, W.McGehee, R. C. O'Handley, and M. Richard, J. Appl. Phys. Vol. 101, pp 123917–123926 (2007).

"Ferromagnetic Shape Memory Alloys: Theory of Interactions," J. Appl. Phys.97, 10M312, 15 May 2005.

"The Ferromagnetic Shape-Memory Effects in Ni-Mn-Ga," J. Magnetism and Magnetic Materials, 35, 290 (2005).

Icomt'05, paper 202 "Ferromagnetic Shape Memory Alloys: Science and Technology."

"Temperature Dependence of Field-Induced Strain in Ferromagnetic Shape Memory Alloys," Materials Science & Engg. A2006, Icomat05, accepted for publication

"Theory of Magnetization: Twin boundary interaction in ferromagnetic shape memory alloys," with J. Marquiss and D. Quattrochi, Jrnl. of Aplied Physics, Vol. 93, pp 4561-4565, 15 April 2003.

"Magnetic field-induced strain in single crystal Ni-Mn-Ga," with R. C. O'Handley, S. M. Allen, C. P. Henry, et al, SPIE 5053, 207 (2003).

"Magnetization Considerations for Models of Ferromagnetic Shape Memory Actuation," SPIE 2002, San Diego.

"Magnetization Distribution and Coercivity in Multigrain Materials," with D.J. Quattrochi, J. of Appl. Phys. 91 10, 15 May 2002.

"Field-Induced Strain in Ferromagnetic Shape Memory Alloys: From Macroscopic to Microscopic Materials," SPIE 2002, San Diego (with R.C. O'Handley, M. Marioni, C.P. Henry, M. Richard, P.G. Tello, and S.M. Allen).

"Micromagnetics and Micromechanics of Ni-Mn-Ga Actuation," Proc. of the ICOMAT, Helsinki, June 2002 (with R.C. O'Handley, M. Marioni, C.P. Henry, M. Richard, P.G. Tello, and S.M. Allen).

"Analytic Solution for Magnetic Orientation between Grains," IEEE Trans. on Magnetics, 37 1478 (2001) (with C.M. Robson and H.N. Bertram).

."Magnetization Distribution in Thin Films with Perpendicular Surface Anistropy," J. Appl Phys., 82, 2439–2446, Sept 1997 (with N. Bertram).

"New Perpendicular Magnetic Recording Media for High-Density Optical and Inductive Data Storage,"Phys. Rev. Lett. 75 1839 (1995) and presented as invited paper at the Int'l Conf. on Magnetism in Cambridge, England (1995) and the 40th Annual conference on Magnetism and Magnetic Materials in Philadelphia on Nov. 8, 1995 (with R. C. O'Handley, H. J. Hub, and G. Bochi).

"Ferromagnetic Coercivity and Applied Field Orientation,"Jrnl of Mag. and Mag. Mat'ls 147 331–340 (1995) (with B. Edwards).

"Magnetic Field Orientation and Coercivity,"J. Appl. Phys. 76 6271 1994 (with B. Edwards).

"Magnetic Reversal in Small Structures,"J. Appl. Phys. 75 6619 (1994) (with A. Cresswell).

"Single Domain Crystalline Anisotropy Dominated Coercivity,"Physical Review B 48 3803 (1993) (with A. Cresswell).

"Random Magnetic Anistropy,"J. Appl. Phys., 67 5775 (1990) (with A. Cresswell).

"Coercivity and Switching Behavior of Amorphous Magnetism,"J. Appl. Phys. 67, 398 (1990) (with A. Cresswell).