Magnetic phase diagram of Fe/Cr multilayers and wedges

Journal of Physics Condensed Matter

Volumn 10, Issue 17, 1998, Pages

  Fishman, R S ^a   Shi, Zhu Pei ^b  

^a OAK RIDGE NATIONAL LABORATORY   (United States)

^b WESTERN DIGITAL CORPORATION   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 0005181936     PISSN: 09538984     EISSN: None     Source Type: Journal    
DOI: 10.1088/0953-8984/10/17/002     Document Type: Article

References (21)

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17. The parameter γ represents the average coupling strength between Fe and Cr at the interfaces. It can be estimated either from first-principles calculations or by comparison with the experimental data. The value of γ = 3 used to model the experimental data in figure 2 corresponds to an average Cr-Fe exchange interaction of 5.4 meV. In bulk Fe, the Fe-Fe interaction is of order 100 meV. So if the Cr-Fe exchange energy at a perfect interface is the same order as the Fe-Fe interaction, then the Cr-Fe interface interaction in Fe/Cr multilayers and wedges is much lower (order of 1/20) than at a perfect interface. This agrees with recent experiments (Venus D and Heinrich B 1996 Phys. Rev. B 53 R1733) and with ab initio calculations (Freyss M, Stoeffler D and Dreyssé H 1997 Phys. Rev. B 56 6047)
18. The parameter γ represents the average coupling strength between Fe and Cr at the interfaces. It can be estimated either from first-principles calculations or by comparison with the experimental data. The value of γ = 3 used to model the experimental data in figure 2 corresponds to an average Cr-Fe exchange interaction of 5.4 meV. In bulk Fe, the Fe-Fe interaction is of order 100 meV. So if the Cr-Fe exchange energy at a perfect interface is the same order as the Fe-Fe interaction, then the Cr-Fe interface interaction in Fe/Cr multilayers and wedges is much lower (order of 1/20) than at a perfect interface. This agrees with recent experiments (Venus D and Heinrich B 1996 Phys. Rev. B 53 R1733) and with ab initio calculations (Freyss M, Stoeffler D and Dreyssé H 1997 Phys. Rev. B 56 6047)
19. N attained [7] at T = 0 in the C phase.
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21. Fullerton E E and Robertson J L 1997 private communication