MAGNETIC-PROPERTIES OF ULTRATHIN EPITAXIAL FCC-FE(001) FILMS ON CU(001) AND CU3AU(001)

被引：39

作者：

MACEDO, WAA ^{[1
]}

KEUNE, W ^{[1
]}

ELLERBROCK, ED ^{[1
]}

机构：

[1] UNIV DUISBURG GESAMTHSCH,ANGEW PHYS LAB,W-4100 DUISBURG 1,GERMANY

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 1991年 / 93卷

关键词：

D O I：

10.1016/0304-8853(91)90402-V

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Ultrathin films (5 monolayers) of epitaxial fcc Fe(100) were grown under molecular-beam conditions on Cu(100) and Cu3Au(001) substrates at 36-degrees-C and were characterized by LEED and AES. All films were found to be ferromagnetic at 295 and 30 K by in-situ Fe-57 conversion-electron Mossbauer spectroscopy in UHV. Most of the Fe-57 nuclei experience a large magnetic hyperfine field of 34.2(5) and 35.2(5)T at 30 K for Cu and Cu3Au, respectively, indicating large atomic magnetic Fe moments which are oriented within the film plane. On the contrary, fcc-Fe(001) films on Cu(001) grown at high substrate temperatures approximately greater-than 200-degrees-C were found to be paramagnetic above almost-equal-to 65 K. Our results are discussed in context with recent band-theoretical calculations of magneto-volume instabilities in fcc Fe.

引用

页码：552 / 556

页数：5

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