John M. Robertson Dies
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realized that large growth-induced anisotropy could be achieved in garnets without the use of magnetic rare earth ions. This led Robertson and his colleagues to develop a new high mobility material for sub-micron bubble domain devices. Similar materials were subsequently adopted for use in production. More recently, Robertson and colleagues pioneered the application of single crystals and epitaxial growth to the fabrication of cathode-ray-tubes (CRT's). In this case, Robertson realized that a Y^Al^O\2, or YAG, substrate could be overgrown with an epitaxial layer that could be usefully doped with activator ions to produce a phosphor for CRT applications. Single crystal CRT's of the Robertson type exhibit high brightness and long life, and appear destined to find application where these qualities are important. As a materials scientist, Robertson contributed in areas other than crystal growth. During the last three years, he was active in the laser treatment of materials and was recently successful in engineering both the materials properties and production methods for amorphous metal ribbons for recording head applications. John Robertson published some ninety papers. He worked with great intensity, preferably in an areas where little was known. He possessed a faculty for cooperation with others, most particularly device oriented researchers who needed new materials. He enjoyed collaboration with a host of friends throughout the world.
BULLETIN VOLUME IX NUMBER 2 The Materials Research Society BULLETIN is published bi-monthly by the Materials Research Society for its members and others interested in materials science. Correspondence and submissions are invited. They should be brief and typewritten (double-spaced), and the author's affiliation must be indicated. Address all material to the Editor. President C.W. WHITE Oak Ridge National Laboratory Vice President E.N. KAUFMANN Lawrence Livermore National Laboratory Vice President B.R. APPLETON Oak Ridge National Laboratory Secretary R.L. SCHWOEBEL Sandia National Laboratories Treasurer K.C. TAYLOR GM Research Laboratories Past President H.J. LEAMY AT&T Bell Laboratories Executive Director J.B. BALLANCE Materials Research Society, 9800 McKnight Road, Suite 327, Pittsburgh, PA 15237, (412) 367-3003 Editor T.G. MIDDLETON P.O. Box K, Short Hills, NJ 07078, (201) 467-0504
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