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arXiv · 1706.07874

On magnetic structure of CuFe2Ge2: constrains from the 57Fe Mossbauer spectroscopy

Sergey L. Bud'ko·Na Hyun Jo·Savannah S. Downing·Paul C. Canfield
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Abstract

57Fe Mossbauer spectroscopy measurements were performed on a powdered CuFe2Ge2 sample that orders antiferromagnetically at ~ 175 K. Whereas a paramagnetic doublet was observed above the Neel temperature, a superposition of paramagnetic doublet and magnetic sextet (in approximately 0.5 : 0.5 ratio) was observed in the magnetically ordered state, suggesting a magnetic structure similar to a double-Q spin density wave with half of the Fe paramagnetic and another half bearing static moment of ~ 0.5 - 1 mu_B. These results call for a re-evaluation of the recent neutron scattering data and band structure calculations.

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Sergey L. Bud'ko, Na Hyun Jo, Savannah S. Downing, Paul C. Canfield. 2017-06-23. On magnetic structure of CuFe2Ge2: constrains from the 57Fe Mossbauer spectroscopy. https://doi.org/10.1016/j.jmmm.2017.09.046

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