Domain Configurations, Bloch Walls and Magnetization Processes in Iron Whiskers from D.C. to 200 kHz. Theory and Experiment II

1973 ◽  
Author(s):  
A. S. Arrott ◽  
B. Heinrich ◽  
D. S. Bloomberg ◽  
Hugh C. Wolfe ◽  
C. D. Graham ◽  
...  
Keyword(s):  
Iron Whiskers ◽  
Magnetization Processes ◽  
Theory And Experiment

Domain Configurations, Bloch Walls, and Magnetization Processes in Iron Whiskers from D.C. to 200 kHz. Theory and Experiment. I

1972 ◽  
Vol 50 (7) ◽  
pp. 710-720 ◽  
Author(s):  
B. Heinrich ◽  
A. S. Arrott
Keyword(s):  
Eddy Currents ◽  
Elastic Membrane ◽  
Magnetization Measurements ◽  
Wide Range ◽  
Elastic Wall ◽  
Iron Whiskers ◽  
Magnetization Processes ◽  
Theory And Experiment

Bloch walls in iron whiskers have been studied by direct magnetization measurements. Of several types of domain configurations the simplest, the Landau structure, is readily identified from the a.c. permeability. The behavior of this structure over a wide range of frequencies is accounted for by a model which treats the wall as an elastic membrane attached to two springs on its ends. The stiffness is shown to be magnetostatic in origin. The elastic wall is shown to be damped in its motion by eddy currents. The qualitative aspects of the behavior are well accounted for and some numerical consistencies are found.

Magnetization Processes and Eddy Currents in Iron Whiskers

1972 ◽  
Author(s):  
A. S. Arrott ◽  
B. Heinrich ◽  
D. S. Bloomberg
Keyword(s):  
Eddy Currents ◽  
Iron Whiskers ◽  
Magnetization Processes

Magnetization processes of iron whiskers in small magnetic fields

1979 ◽  
Vol 20 (2) ◽  
pp. 159-161 ◽  
Author(s):  
H. H. Mende ◽  
Th. Kleinefeld
Keyword(s):  
Magnetic Fields ◽  
Iron Whiskers ◽  
Magnetization Processes

Electrostatic optics and aberration correction in the 1940s and today

1992 ◽  
Vol 50 (1) ◽  
pp. 6-7
Author(s):  
Gertrude F. Rempfer
Keyword(s):  
Electron Microscope ◽  
Focal Point ◽  
Focal Length ◽  
High Vacuum ◽  
Electron Optics ◽  
Applied Physics ◽  
Electrostatic Lenses ◽  
Commercial Instrument ◽  
The University ◽  
Theory And Experiment

I became involved in electron optics in early 1945, when my husband Robert and I were hired by the Farrand Optical Company. My husband had a mathematics Ph.D.; my degree was in physics. My main responsibilities were connected with the development of an electrostatic electron microscope. Fortunately, my thesis research on thermionic and field emission, in the late 1930s under the direction of Professor Joseph E. Henderson at the University of Washington, provided a foundation for dealing with electron beams, high vacuum, and high voltage.At the Farrand Company my co-workers and I used an electron-optical bench to carry out an extensive series of tests on three-electrode electrostatic lenses, as a function of geometrical and voltage parameters. Our studies enabled us to select optimum designs for the lenses in the electron microscope. We early on discovered that, in general, electron lenses are not “thin” lenses, and that aberrations of focal point and aberrations of focal length are not the same. I found electron optics to be an intriguing blend of theory and experiment. A laboratory version of the electron microscope was built and tested, and a report was given at the December 1947 EMSA meeting. The micrograph in fig. 1 is one of several which were presented at the meeting. This micrograph also appeared on the cover of the January 1949 issue of Journal of Applied Physics. These were exciting times in electron microscopy; it seemed that almost everything that happened was new. Our opportunities to publish were limited to patents because Mr. Farrand envisaged a commercial instrument. Regrettably, a commercial version of our laboratory microscope was not produced.

Electronic properties of TTF-TCNQ : a connection between theory and experiment

1978 ◽  
Vol 39 (12) ◽  
pp. 1355-1363 ◽  
Author(s):  
L.G. Caron ◽  
M. Miljak ◽  
D. Jerome
Keyword(s):  
Electronic Properties ◽  
Theory And Experiment

MAGNETIZATION PROCESSES IN HELICAL MnP

1971 ◽  
Vol 32 (C1) ◽  
pp. C1-972-C1-973
Author(s):  
T. NAGAMIYA ◽  
S. HIYAMIZU
Keyword(s):  
Magnetization Processes

ANOMALOUS MAGNETIZATION PROCESSES AT LOW TEMPERATURES IN COMPOSITIONALLY MODULATED Co/Mn THIN FILMS

1988 ◽  
Vol 49 (C8) ◽  
pp. C8-1753-C8-1754
Author(s):  
H. Sakakima ◽  
M. Tessier ◽  
R. Krishnan ◽  
E. Hirota
Keyword(s):  
Thin Films ◽  
Low Temperatures ◽  
Magnetization Processes

MAGNETIZATION PROCESSES IN MELT SPUN NdFeB-MAGNETS

1988 ◽  
Vol 49 (C8) ◽  
pp. C8-655-C8-656 ◽  
Author(s):  
A. Handstein ◽  
J. Schneider ◽  
U. Heinecke ◽  
R. Grössinger ◽  
H. Sassik
Keyword(s):  
Ndfeb Magnets ◽  
Melt Spun ◽  
Magnetization Processes
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