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Changes in the Physical Properties Due to the Structures and the Compositions of Mn-Fe Alloy Films
이영백,J. B. Kim,R. Gontarz,Y. V. Kudryavtsev 한국물리학회 2004 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.44 No.32
The structural and the compositional dependences of the magneto-optical, the optical and the magnetic properties of Mn1ကxFex alloy lms have been investigated. It was revealed that the EKE (equatorial Kerr eect) signal at 293 K is observed only for x > 0.50. All the EKE spectra have nearly the same spectral shape (Fe-like) and dier from each other only in intensity. The observed experimental EKE spectra for the Fe-rich Mn1ကxFex alloy lms are nicely described by the simulated ones made in the framework of eective-medium approximation. The optical properties, such as optical conductivity, of all the investigated alloys can be separated into three groups which correspond to dierent crystalline structures: predominance of the -Fe (0.8 < x < 0.97), the -Mn-Fe (0:2 < x < 0:6) and the -Mn (0:02 < x < 0:23) phases, respectively.
Properties of Au-Fe disordered alloy films near the \emph{fcc-bcc} structural transformation
Y. P. Lee,Y. V. ~Kudryavtsev,R. Gontarz,Y. H. Hyun,Y. H. Hyun 한국물리학회 2003 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.43 No.42
Au-Fe alloys are characterized by a \emph{fcc-bcc} structural transformation on the Fe-rich side. The magneto-optical (equatorial Kerr effect: EKE) and optical properties of Au$_{1-x}$Fe$_{x}$ (0 $<$ x $<$ 1) were investigated in the 0.5 - 5.0 eV energy range. The X-ray diffraction study shows the structural \emph{fcc-bcc} transformation at about 80 at.\% of Fe. Noticeable changes in the optical properties caused by the structural transformation were observed. The shape and the intensity of the EKE spectrum, as well as the field dependence of the magneto-optical response, were also significantly changed. It is thought that these changes come mainly from the induced magnetic moment of Au (and/or an enhanced magnetic moment of Fe). The nature of a prominent structure observed in the UV range of the magneto-optical Kerr spectrum of Au/Fe multilayered films is discussed in connection with the results.
Magneto - optical and optical properties of Fe - Au alloy films in a wide composition range
Y. H. Hyun,C. O. Kim,Y. P. Lee,Y. V. Kudryavtsev,R. Gontarz,K. W. Kim 한국진공학회(ASCT) 2001 Journal of Korean Vacuum Science & Technology Vol.5 No.2
Fe-Au alloys are characterized by the complete solubility, and exhibit an fcc-bcc structural transformation at the Fe-rich side. The magneto-optical(equatorial Kerr effect : EKE) and optical properties of Fe_(1-x)Au_x (0 < x < 1) were investigated in the 0.5 - 5.0 eV energy range. The x-ray diffraction study shows the structural fcc-bcc transformation about 80 at.% of Fe. Noticeable changes in the optical properties caused by the fcc-bcc structural transformation was observed. The shape and intensity of the EKE spectra as well as the field dependence of the magneto-optical response were also significantly changed. It is thought that these changes are mainly comes from the induced magnetic monent in Au(and/or the emhanced magnetic moment of Fe). The nature of the prominent structure observed in the UV range of the magneto-optical Kerr effect of Au/Fe multilayered films are disscussed in connection with the above results.