Papers by Francois Cornish
Preface: Galt, J.]Appendix.Dedication:Content description: Detailed contentsIllustration: 1 (Maps... more Preface: Galt, J.]Appendix.Dedication:Content description: Detailed contentsIllustration: 1 (Maps ,)Pagination: PP16+386PVolumes: 1Text Genre:LettersIllustration: 1 (χάρτες ,
Written in 1813, this is one of the earliest regional and social novels. In it Galt realized his ... more Written in 1813, this is one of the earliest regional and social novels. In it Galt realized his ambition "to write a book that would be for Scotland what The Vicar of Wakefield is for England." The text is based on the 1821 edition collated with the revision of 1822.
International Astronomical Union Colloquium
Measurements at the 1612 MHz OH line are necessary to identify and study an important class of hi... more Measurements at the 1612 MHz OH line are necessary to identify and study an important class of highly evolved stars whose properties cannot be determined by other means. Observing at this frequency over an 18 month period has been a frustrating experience in “sharing” a small portion of the 1610-1626.5 MHz frequency allocation on a secondary basis with the Aeronautical Radionavigation Service. Transmissions from the GLONASS satellite system are so powerful that they are received in the side lobes and back lobes of the radio telescope, no matter where in the sky it is pointing as long as one satellite is above the horizon. On most days about half the observations had to be discarded to prevent spurious satellite signals from masquerading as astronomical spectral lines.
Physical Review
Perromagnetic resonance data are presented as a function of temperature from 4. 2'K to 380'K in (... more Perromagnetic resonance data are presented as a function of temperature from 4. 2'K to 380'K in (¹O)0, 9q(FeO)a, pgFe20q and in (NiO)0, 75(FeO)0, 2&Fe&O&. When. the effects of eddy currents are corrected for, most of the energy dissipation in (NiO)0 r&(FeO)o. wFe&03 as measured by the resonance line width is shown to be due to a relaxation mechanism associated with the presence of divalent iron. The line width shows a maximum at 160'K at our frequency of measurement (24 000 Mc/sec). A thermodynamical analysis of the loss mechanism is presented which assumes that a torque associated with part of the free energy relaxes. This correlates the line width quite satisfactorily with the temperature dependence observed in the magneto-crystalline anisotropy and the spectroscopic splitting (g) factor. I. INTRODUCTION ''N recent years, several studies of ferromagnetic~r esonance line width have been made in single crystals of ferrites. '~I t has, however, remained difFicult to understand the mechanism of the losses in these materials. The purpose of the present paper is to report ferromagnetic resonance experiments on single crystals of two ferrite compositions which we feel throw some light on this mechanism. Quantitative chemical analysis for Ni and Fe together with the usual valences give (N10) o.ss(FeO) s.ssFesOs and (NiO) s.rs (FeO)s.ssFesOs as the simplest formulas for the compositions on which we have worked. There is some possibility of small variations from these formulas in detail, but they are at least good approximations. The 6rst of these compositions was grown by J. P. Remeika at Bell Laboratories using a slight variation on a method previously reported' which involves solutions of the constituent oxides in borax at high temperatures. The second composition was grown by Dr. G. %. Clark of the Linde Air Products Company by means of a Qame fusion method.
Proceedings of the IEE - Part B: Radio and Electronic Engineering
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Papers by Francois Cornish