Changes of magnetic domain structure induced by temperature-variation and electron-beam irradiation in Pr0.5Sr0.5CoO3

Uchida, M.; Mahendiran, R.; Tomioka, Y.; Matsui, Y.; Ishizuka, K.; Tokura, Y.
March 2005
Applied Physics Letters;3/28/2005, Vol. 86 Issue 13, p131913
Academic Journal
In situ observation of magnetic domain structures of Pr0.5Sr0.5CoO3 was made by Lorentz electron microscopy to reveal an unusual magnetic behavior around 120 K below the Curie temperature (TC∼220 K). The observations in a cooling run clearly showed that the magnetic domain structure changes below about 90 K and that the transformed domain structure remains unchanged down to 20 K. Furthermore, it was found that an electron-beam irradiation in an electron microscope induces a reversible transformation of the magnetic domain structure at 20 K. Possible mechanisms of such magnetic-domain structural changes are discussed.


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