Jack H. Judy
Professor

B.S., 1957, EE., Massachusetts Institute of Technology
M.S., 1959, EE., Massachusetts Institute of Technology
E.E., 1961, EE., Massachusetts Institute of Technology
Ph.D., 1965, EE, University of Minnesota

Telephone: (612) 625-7381
Office Hours

E-mail: judy@ece.umn.edu
Web Page: http://www.ece.umn.edu/users/judy/

My research involves the deposition, characterization, and application of multilayer thin film materials for magnetic information storage technologies. My research programs are focused on correlating the micromagnetic and physical microstructures of magnetic thin films with macromagnetic properties and magnetic recording processes at ultra-high areal densities, measurement and modeling of coherent and incoherent magnetization reversal and hysteresis, intrinsic magnetic noise, magenetic exchange interactions, development of nano-characterization techniques, and optimization of thin films for magnetic recording media and heads, magnetic sensors, and magnetic thin film memories.

The Center for Micromagnetics and Information Technologies (MINT) possess high vacuum equipment for the deposition of polycrystalline and amorphous magnetic and wear and corrosion resistant thin films by various sputtering techniques. The MINT has characterization equipment including vibrating sample and torque magnetometers, transmission and scanning electron, optical, magneto-optical, atomic force, and magnetic force microscopes, and computer-controlled recording spinner and stiction/friction testers.


Selected Publications

Thin Film Recording Media, Materials Research Soc. Bull., Vol. XV, No. 3, 63 (1990); Judy.

Effects of Substrate Temperature on Intergranular Interactions and Recording Performance of CoCrTa/Cr Thin Film Media, PMRC 1991, Lu, Chen, Judy, Sivertsen.

Magnetization Cross-track Correlations and Transition Noise of Longitudinal Thin Film Media, IEEE Trans. on Magn., MAG-28 (1992); Hsu, Zhu, Sivertson, Judy.

Deconvolution of Magnetic Force Images by Fourier Analysis, IEEE Trans. on Magn. MAG28 (1992); Chang, Lagerquist, Judy, Zhu.

Micromagnetic Structures of Track-center and Track-edge Transitions Recorded in Thin Film Media with a Thin Film Head, IEEE Trans. on Magn. MAG28 (1992); Kawabe, Judy

Effects of Pt Content and Substrate Bias on Structure and Magnetic Properties of CoCrPt/Cr Thin Films, J. Appl. Phys., Vol. 73, 5563 (1993); Glijer, Sivertson, Judy

Effect of Substrate Temperature on Microstructure and Noise Properties of CoCrTaPt/Cr Thin Film Media, Proceedings of the Electrochemical Society Meeting (1993); Sin, Sivertson, Judy.

Experimental Studies of Noise in Isotropic Longitudinal CoCrTa/Cr Thin Film Media, IEEE trans. on Magn. MAG29, 209 (1993); Judy.

Characterization of Change of Carbon Bonding Due to Sliding Wear Damage by Scanning Auger Microscopy, IEEE Trans. on Magn. MAG29 (1993); Yeh, Lin, Sivertson, Judy, Chen.

Comparison of Reproduce Signal and Noise of Conventional and Keepered Thin Film Media, J. Appl. Phys. (1994); Sin, Ding, Glijer, Sivertson, Judy, Zhu.