DocumentCode
967404
Title
Photomagnetic and time effects in57Fe NMR in YFeO3
Author
Nadolski, Stefan
Author_Institution
Polish Academy of Sciences, Warsaw, Poland
Volume
14
Issue
5
fYear
1978
fDate
9/1/1978 12:00:00 AM
Firstpage
912
Lastpage
914
Abstract
Two types of photomagnetic effects were found in YFeO3 by NMR method. At 
K there exist the relaxation effect involving the change of domain wall thickness caused by the wall\´s displacement. The illumination of the sample shortens the recovery time. The above effect depends on the domain wall position and is reversible. At helium temperatures irradiation of the sample lowers the enhancement factor. This process is irreversible and does not depend on domain wall position. All the above effects disappear after annealing the sample in a hydrogen atmosphere. This fact suggests, that relaxation processes are connected with the presence of Fe4+ions.
K there exist the relaxation effect involving the change of domain wall thickness caused by the wall\´s displacement. The illumination of the sample shortens the recovery time. The above effect depends on the domain wall position and is reversible. At helium temperatures irradiation of the sample lowers the enhancement factor. This process is irreversible and does not depend on domain wall position. All the above effects disappear after annealing the sample in a hydrogen atmosphere. This fact suggests, that relaxation processes are connected with the presence of Fe4+ions.Keywords
Antiferromagnetic materials/devices; Ferrites; Magnetic domains; Magnetic thermal factors; Magnetooptic measurements; Nuclear magnetic resonance; Relaxation processes; Frequency; Helium; Lighting; Magnetic domain walls; Magnetic field measurement; Magnetic properties; Magnetooptic effects; Nuclear magnetic resonance; Temperature; Yttrium;
fLanguage
English
Journal_Title
Magnetics, IEEE Transactions on
Publisher
ieee
ISSN
0018-9464
Type
jour
DOI
10.1109/TMAG.1978.1059935
Filename
1059935
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