IRON-OXIDE THIN-FILMS PRODUCED BY LASER ABLATION DEPOSITION

被引：20

作者：

MASTERSON, HJ ^{[1
]}

LUNNEY, JG ^{[1
]}

COEY, JMD ^{[1
]}

MOUKARIKA, A ^{[1
]}

机构：

[1] UNIV IOANNINA,DEPT PHYS,IOANNINA,GREECE

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 1992年 / 115卷 / 2-3期

关键词：

D O I：

10.1016/0304-8853(92)90046-Q

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Iron oxide films of good optical quality have been prepared by laser ablation deposition using a KrF excimer laser. By varying the oxygen partial pressure from 10(-7) to 10(-1) mbar the composition can be varied from Fe3O4 to alpha-Fe2O3. X-ray diffraction and Mossbauer spectroscopy studies reveal that the films are nanocrystalline. Magnetisation measurements reveal a decreasing magnetic moment as the film composition varies from Fe3O4 to alpha-Fe3O4. Fe3O4 films deposited on (0001) sapphire substrates at T > 650-degrees-C, are oriented with their [111] direction perpendicular to the film plane. Subsequent annealing in air oxidises the Fe3O4 films to gamma-Fe2O3. Square in-plane hysteresis loops with a coercivity of 45 mT are obtained from investigations of the transverse magneto-optic Kerr effect.

引用

页码：155 / 162

页数：8

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