Interplay of Fe and Tm moments through the spin-reorientation transition in 
TmFe O3

Staub, U.; Rettig, Laurenz; Bothschafter, E. M.; Windsor, Yaov William; Ramakrishnan, M.; Avula, S. R. V.; Dreiser, J.; Piamonteze, C.; Scagnoli, V.; Mukherjee, S.; Niedermayer, C.; Medarde, M.; Pomjakushina, E.

doi:10.1103/PhysRevB.96.174408

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Interplay of Fe and Tm moments through the spin-reorientation transition in TmFe O₃

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Rettig, Laurenz
Swiss Light Source, Paul Scherrer Institut;
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

/persons/resource/persons203272

Windsor, Yaov William
Swiss Light Source, Paul Scherrer Institut;
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

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Zitation

Staub, U., Rettig, L., Bothschafter, E. M., Windsor, Y. W., Ramakrishnan, M., Avula, S. R. V., et al. (2017). Interplay of Fe and Tm moments through the spin-reorientation transition in TmFe O₃. Physical Review B, 96(17): 174408. doi:10.1103/PhysRevB.96.174408.

Zitierlink: https://hdl.handle.net/11858/00-001M-0000-002E-32A4-6

Zusammenfassung

X-ray magnetic circular dichroism (XMCD) and x-ray magnetic linear dichroism (XMLD) have been used to investigate the Fe magnetic response during the spin-reorientation transition (SRT) in TmFeO₃. Comparing the Fe XMLD results with neutron-diffraction and magnetization measurements on the same sample indicates that the SRT has an enhanced temperature range in the near surface region of approximately 82 to 120 K compared to approximately 82 to 92 K in bulk. This view is supported by complementary resonant soft x-ray- diffraction experiments at the Tm M₅ edge. These measurements find an induced magnetic moment on the Tm sites, which is well described by a dipolar mean-field model originating from the Fe moments. Even though such a model can describe the 4ƒ response in the experiments, it is insufficient to describe the SRT even when considering a change in the 4ƒ anisotropy. Moreover, the results of the Fe XMCD show a different temperature evolution through the SRT, the interpretation of which is hampered by additional spectral shape changes of the XCMD signal.