By Topic

IEEE Transactions on Magnetics

Issue 3 • September 1972

Filter Results

Displaying Results 1 - 25 of 248
  • [Front cover and table of contents]

    Publication Year: 1972, Page(s): 0
    Request permission for commercial reuse | PDF file iconPDF (1194 KB)
    Freely Available from IEEE
  • Words of welcome

    Publication Year: 1972, Page(s):258 - 261
    Request permission for commercial reuse | PDF file iconPDF (1826 KB)
    Freely Available from IEEE
  • 1972 INTERMAG keynote address

    Publication Year: 1972, Page(s):262 - 265
    Request permission for commercial reuse | PDF file iconPDF (417 KB)
    Freely Available from IEEE
  • INTERMAG: 10 years

    Publication Year: 1972, Page(s):266 - 267
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (224 KB)

    First Page of the Article
    View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • The characterization of magnetic bubble-domain materials with X-ray topography

    Publication Year: 1972, Page(s):268 - 272
    Cited by:  Papers (15)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1168 KB)

    The use of X-ray topography to characterize magnetic bubble materials is discussed. By mapping the crystal strains, the technique reveals defects which can influence the bubble domains and which are not easily observed by other methods. Examples of topographs are given for flux grown iron garnets, Czochralski grown Gd3Ga5O12substrate crystals, and LPE iron garnet l... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Induced in-plane magnetic anisotropy in YIG films

    Publication Year: 1972, Page(s):273 - 275
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (336 KB)

    We have studied the symmetry properties of the in-plane induced magnetic anisotropy in {100} and {110} disks of single crystal YIG epitaxially grown on gadolinium gallium garnet (GGG) substrates. The ferromagnetic resonance (FMR) technique was used to determine the values of the cubic and induced magnetic anisotropies. The induced anisotropy is interpreted in terms of a magnetostrictive magnetic p... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Seebeck coefficients near a spin ordering temperature

    Publication Year: 1972, Page(s): 276
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (138 KB)

    The Seebeck coefficient, or thermoelectric power (TEP), couples the fluctuations in electric current with those of heat transport. We derive a new relationship between the thermoelectric power and the thermal conductivity using the generalized theory of Brownian motion. The TEP temperature derivative in ferromagnets has a singular behavior like that of the specific heat. In antiferromagnets, the s... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • The variation of 4πMs, Tcand Ga/Fe ratio with LPE growth temperature in bubble domain films

    Publication Year: 1972, Page(s):275 - 276
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (272 KB)

    Magnetic bubble domain films of nominal composition EuEr2Ga0.7Fe4.3O12have been successfully grown on View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Thermal expansion of lattice parameters of some rare earth gallium garnets and magnetic bubble domain materials

    Publication Year: 1972, Page(s): 276
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (138 KB)

    The rare earth gallium garnets Dy3Ga5O12, Gd3Ga5O12, Sm3Ga5O12, and Nd3Ga5O12used as substrate materials and the magnetic film materials EuEr2GaxFe5-xO12(0 leq x leq 5) and EuxEr3-xGa0.7... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Pyromagnetic study of the magnetic phase transition in CoS2-xSex

    Publication Year: 1972, Page(s): 276
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (138 KB)

    The pyromagnetic response has been measured for the CoS2-xSexfamily over a selenium concentrationxvarying from 0 to 0.15. As the concentration is initially increased from 0, the pyromagnetic peak increases in height and narrows, which is consistant with a sharpening of the second-order transition. Nearx = 0.1, the response suddenly drops in magnitude by ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Transport phenomena of Cd1-xInxCr2Se4

    Publication Year: 1972, Page(s): 276
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (138 KB)

    There have been many studies on the magnetic semiconductor CdCr2Se4which report the large effect of magnetic ordering on its transport properties in the Ga- or In-substituted material. The substituted material shows N-type conduction compared to P-type conduction in the unsubstituted. The electrical resistivity has a maximum near its Curie point, and then decreases with a fur... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Switching effects in magnetic semiconductors

    Publication Year: 1972, Page(s): 276
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (138 KB)

    Single crystals of CdCr2Se4undergo a transition ("switching") from a low conductivity to a high conductivity state at a certain threshold electric field strength, as in Si-doped YIG. The appearing IV characteristics are similar to those of amorphous semiconductors. However, for the crystalline ferri-and ferromagnetic materials this switching is induced by well-defined transit... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Magnetite thin films

    Publication Year: 1972, Page(s):277 - 278
    Cited by:  Papers (14)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (232 KB)

    A low temperature process for converting hematite (α-Fe2O3) thin films into magnetite (Fe3O4is described. The films produced are unambiguously identified as magnetite by several complementary methods of analysis. These include α-backscattering spectrography, X-ray powder diffractometry, and observations of electrical, magnetic, and optical prop... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Magnetic coupling between two Ni-Fe layers separated by SiO

    Publication Year: 1972, Page(s): 279
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (105 KB)

    The magnetic coupling between the magnetization in two nonmagnetostrictive Ni-Fe layers separated by a SiO layer has been investigated by means of a transverse susceptibility measurement. The main results are that 1) the coupling energy Ec per Unit area of the multilayered film has a form ofE_{c}= -A cos (phi_{1}-phi_{2}), wherephi_{1}-phi_{2}is the angle between the magnetiz... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Effect of deuteron irradiation on the magnetic anisotropy of oblique incidence evaporated films

    Publication Year: 1972, Page(s): 279
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (105 KB)

    Thin magnetic films (50-100% Ni-Fe) produced by vacuum evaporation at oblique incidence angles (θ) of 30° and 60° were irradiated by 250 kV deuteron dose (sim1 times 10^{13}/cm2.s) at temperatures below 50°C. The composition dependence of Ku(uniaxial anisotropy constant) of the films as depodited was almost linear, being positive and large at 50... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Helical anisotropic magnetic film

    Publication Year: 1972, Page(s): 279
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (105 KB)

    Permalloy films have been evaporated onto glass substrates rotating with 0.05 to 450 r/m in a d.c. magnetic field. The magnetic uniaxial anisotropy was measured by using a torque magnetometer and the hysteresis loop was taken by using a 50 Hz hysteresis loop tracer. The magnetic anisotropy and the coercive forces,H_{cparallel}andH_{cperp}, which are measured along the easy an... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Spin wave measurements of exchange constant in Ni-Fe alloy films

    Publication Year: 1972, Page(s):280 - 281
    Cited by:  Papers (17)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (224 KB)

    The ferromagnetic exchange constant has been measured using spin wave resonance in a number of iron-nickel alloys covering the composition range 60% to 90% nickel. The exchange constant varies smoothly from a value of 1.3 (10-6) erg . cm-1at 60% Ni to an extrapolated value of 0.77 (10-6) at 100% Ni. The data are in significant disagreement with the values published... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • The magnetic and semiconductor hybrid: Polyphase multivibrator with AC bias

    Publication Year: 1972, Page(s):282 - 285
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (360 KB)

    An ac bias operated multivibrator for dc to polyphase conversion is presented. The multivibrator introduced here is of multicore construction, having the number of saturable cores equal to the number of phases. It has several common windings wound through all the cores and two or more separate windings wound on each of the cores. A multivibrator is constructed with the common windings and two tran... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Thyristor series resonant DC-DC chopper

    Publication Year: 1972, Page(s):286 - 288
    Cited by:  Papers (2)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (261 KB)

    A series resonantL-Ccircuit connected in series with the SCR provides a simple and reliable means of commutating the thyristor in a dc-dc chopper. By having the load connected in parallel with the resonant circuit and a diode shunting the capacitor, a Fixed SCR commutating voltage is maintained over a wide range of loads. An experimental model circuit was successfully operated with... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Evaluation of core characteristics of magnetic phase shifters for thyristor amplifiers

    Publication Year: 1972, Page(s): 288
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (75 KB)

    The exciting current characteristic is suggested as a new method of evaluating the core characteristic. The phase shifting characteristic and the difference between a positive and negative waveform of a balanced half-wave type magnetic phase shifter are calculated by using the exciting current characteristics of cores employed in it. From these theoretical analyses, it can be determined that the d... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A computer-aided design procedure for flyback step-up DC-to-DC converters

    Publication Year: 1972, Page(s):289 - 291
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (344 KB)

    A flyback step-up dc-to-dc power converter is modeled utilizing a linear magnetic core, transistor switch, diode, filter capacitance, and load resistance. Assuming constant voltage drops across the semiconductor elements when conducting, the circuit is analyzed to obtain an equation for the required number of turns, subject to the constraints of specified output voltage, operating frequency, maxim... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Characterization of magnetic materials and circuits for bubble mass memories

    Publication Year: 1972, Page(s): 293
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (120 KB)

    Epitaxial garnet films containing many different mixtures of the rare earths have been prepared for materials and device characterization. In addition, several different types of circuits for propagating and manipulating bubble domains have been proposed and demonstrated. This paper reviews some of the recent progress in characterizing these circuits and materials with respect to mass memory appli... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • On some general laws of DC-DC regulators

    Publication Year: 1972, Page(s):291 - 293
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (344 KB)

    Some general properties and limits of regulator technology are examined independent of circuit topology or device physics. As foundation, the work of Moore and Wilson on DC-DC conversion circuits is used. Their work showed the need for some intermediate DC-AC inversion in the converter. These findings are extended and applied to a dc-dc regulator, defined as a special network deriving all its powe... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Chemical vapor deposition of epitaxial aluminum-substituted YIG for a bubble domain device

    Publication Year: 1972, Page(s):298 - 300
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (321 KB)

    Aluminum-substituted yttrium iron garnet Y3AlxFe5-xO12films were epitaxially grown on the View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • New types of magnetic domain structure in orthoferrite

    Publication Year: 1972, Page(s):294 - 297
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (848 KB)

    Mutual interaction of domains in bubble materials causes new types of domain structure. These structures, which are observed in an orthoferrite platelet, are classified into five categories: 1) periodic bubble domains in the valleys of a wavy wall; 2) coexistence of positive and negative bubbles on both sides of a wavy wall; 3) bubbles within a ring domain; 4) concentric ring domains; and 5) coexi... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.

Aims & Scope

IEEE Transactions on Magnetics publishes research in science and technology related to the basic physics and engineering of magnetism, magnetic materials, applied magnetics, magnetic devices, and magnetic data storage.

Full Aims & Scope

Meet Our Editors

Editor-in-Chief
Pavel Kabos
National Institute of Standards and Technology