Showing papers on "Magneto published in 1974"
TL;DR: In this article, the magnetic properties of iron-garnet films and the use of these films as film-waveguide optical switches were discussed, and a detailed investigation of the switching process between 0 and 300 MHz was performed.
Abstract: We discuss magnetic properties of iron‐garnet films and the use of these films as film‐waveguide optical switches. Our experimental study involves the observation of magnetic domains, measurements of Faraday rotation constants, coercive forces and anisotropy fields, and a detailed investigation of the switching process between 0 and 300 MHz. Our theoretical study includes magneto‐optics in film waveguides, and analysis of the serpentine circuit, and an extensive calculation of the motion of the magnetization. For low driving fields, the process of optical switching is the formation of periodic domains and the subsequent motion of domain walls. For higher driving fields, the process is rotation of the magnetization in unison. The switching field required for 100% modulation is several times the anisotropy field in the film, which can be as small as 0.1 Oe.
58 citations
16 citations
Journal Article•
TL;DR: In this paper, the conditions générales d'utilisation (http://www.numdam.org/conditions) of the agreement with the Scuola Normale Superiore di Pisa are described.
Abstract: © Scuola Normale Superiore, Pisa, 1974, tous droits réservés. L’accès aux archives de la revue « Annali della Scuola Normale Superiore di Pisa, Classe di Scienze » (http://www.sns.it/it/edizioni/riviste/annaliscienze/) implique l’accord avec les conditions générales d’utilisation (http://www.numdam.org/conditions). Toute utilisation commerciale ou impression systématique est constitutive d’une infraction pénale. Toute copie ou impression de ce fichier doit contenir la présente mention de copyright.
9 citations
7 citations
TL;DR: In this article, a strain-free BixTm3−xGayFe5−yO12 LPE was grown strain free on (111) Gd3Ga5O12 substrates.
Abstract: LPE films of BixTm3−xGayFe5−yO12 have been grown strain‐free on (111) Gd3Ga5O12 substrates. Films with x ≃ 0.6, 0.8
6 citations
Patent•
21 Oct 1974TL;DR: In this article, a breakerless capacitive discharge ignition system is provided for use in connection with a magneto power supply, and a time delay circuit is provided to delay discharge of the capacitor until it is completely charged by a pulse of electrical energy being emitted from the magneto.
Abstract: A breakerless capacitive discharge ignition system is provided for use in connection with a magneto power supply. A time delay circuit is provided to delay discharge of the capacitor until it is completely charged by a pulse of electrical energy being emitted from the magneto.
5 citations
3 citations
3 citations
2 citations
Patent•
22 Oct 1974
TL;DR: In this paper, a breakerless capacitive discharge ignition system is provided for use in connection with a magneto power supply, and a time delay circuit is provided to delay discharge of the capacitor until it is completely charged by a pulse of electrical energy being emitted from the magneto.
Abstract: A breakerless capacitive discharge ignition system is provided for use in connection with a magneto power supply. A time delay circuit is provided to delay discharge of the capacitor until it is completely charged by a pulse of electrical energy being emitted from the magneto.
2 citations
Patent•
14 Aug 1974TL;DR: A voltage stabilizing device for a magneto alternating current generator for stabilizing and maintaining the alternating current output voltage at an effective value less than a certain predetermined level is described in this paper.
Abstract: A voltage stabilizing device for a magneto alternating current generator for stabilizing and maintaining the alternating current output voltage at an effective value less than a certain predetermined level includes means for detecting the rising of the alternating current output voltage to a given reference voltage after rectification of the alternating output voltage of the magneto alternating current generator and means for phase controlling a controlled rectifier having a control electrode as a function of the difference between the raised output voltage and the reference voltage. The controlled rectifier is coupled across the output of the magneto alternating current generator.
TL;DR: In this article, the oscillatory behavior of the magneto-current with forward bias and its variation with temperature and magnetic field have been studied in various semiconductor diodes.
Abstract: The oscillatory behaviour of the magneto-current with forward bias and its variation with temperature and magnetic field have been studied in various semiconductor diodes. The oscillatory magneto-c...
01 Jan 1974
TL;DR: In this paper, high-resolution electroreflectance using magnetic fields up to 147.7 kG in the Faraday configuration has been used for direct interband magneto-optical transitions.
Abstract: Direct interband magneto-optical transitions have been observed by means of high resolution electroreflectance using magnetic fields up to 147.7 kG in the Faraday configuration. Low temperature results are reported for the E. transition of Ge and for the E1 and E1+Δ1 edge of InSb.