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

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

卷:446

Article

Bud'ko, Sergey L.¹ 

[1] US DOE, Ames Lab, Ames, IA 50011 USA

关键词: Mossbauer spectroscopy;    Magnetic order;    Hyperfine parameters;   

DOI  :  10.1016/j.jmmm.2017.09.046

来源: Elsevier

【 摘 要 】

Fe-57 Mossbauer spectroscopy measurements were performed on a powdered CuFe2Ge2 sample that orders antiferromagnetically at similar to 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 similar to 0: 5 - 1 mu B. These results call for a re-evaluation of the recent neutron scattering data and band structure calculations, as well as for deeper examination of details of sample preparation techniques. (C) 2017 Elsevier B.V. All rights reserved.

【 授权许可】

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