This inventor holds 5 USPTO granted patents. Top assignee: U.S. Philips Corporation. Active years: 1978-1984.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile
Company Filing History:
Years Active: 1978-1984
Title: Innovations of John M Robertson
Introduction
John M Robertson is a notable inventor based in Eindhoven, Netherlands. He has made significant contributions to the field of magnetic domain propagation, holding a total of 5 patents. His work is characterized by innovative devices that enhance the manipulation of magnetic domains, which are crucial for various technological applications.
Latest Patents
One of his latest patents is a device for propagating magnetic domains. This device includes a monocrystalline nonmagnetic substrate made of rare earth gallium garnet, which bears a layer of iron garnet capable of supporting local enclosed magnetic domains. The iron garnet layer is grown in compression on a (100) face of the nonmagnetic substrate. This specific iron garnet comprises manganese in part of the iron sites of its crystal lattice, along with yttrium and at least one representative selected from the group comprising bismuth and rare earth metals in the dodecahedral lattice sites. The resulting magnetic garnet exhibits very high uniaxial anisotropy and high domain mobility, making it extremely suitable for propagating submicron magnetic domains with diameters as small as 0.4 µm.
Another patent by Robertson also focuses on a device for propagating magnetic domains. This device comprises a monocrystalline nonmagnetic substrate of a material with a garnet structure, along with a layer of iron garnet that is grown epitaxially on the nonmagnetic substrate. In this case, the iron garnet includes at least a bismuth ion and a rare-earth ion selected from lutetium, thulium, and ytterbium. This magnetic garnet combines very high uniaxial anisotropy with high domain mobility, making it suitable for the propagation of magnetic domains with diameters ranging from approximately 1 to 2 µm under comparatively low driving fields.
Career Highlights
John M Robertson is associated with U.S. Philips Corporation, where he has been instrumental in advancing research and development in magnetic technologies. His innovative approaches have led to significant advancements in the field, particularly in the manipulation of magnetic domains.
Collaborations
Robertson has collaborated with notable colleagues, including John C Brice and Dirk J Breed. Their combined expertise has contributed to the successful development of various technologies in the realm of magnetic domains.
Conclusion
John M Robertson's
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile