Abstract
The crystal structure and magnetic and electronic transport propertiesof the ternary intermediate compound Pr5Si2Ge2 were investigatedby means of x-ray powder diffraction, magnetic and electricalresistance measurements. The compound has two polymorphs: α-Pr5Si2Ge2crystallizing in a monoclinic structure with space groupP 1121/a , for the as-castsample, and β-Pr5Si2Ge2crystallizing in a tetragonal structure with space groupP 41 21 2,for the sample annealed at 1273 K. The average interatomic distances ofmagnetic Pr atoms and the amounts of covalent (Si, Ge)–(Si, Ge)bond pairs in these two phases are different, which may be responsiblefor their different magnetic properties. The Curie temperaturesTC of α-Pr5Si2Ge2 andβ-Pr5Si2Ge2are 38 and 50 K, respectively. An irreversibility betweenzero-field-cooling and field-cooling magnetization curves is observed.The zero-field resistance of these two phases exhibits an anomaly nearTC.On the basis of the results of magnetic and electrical resistance measurements, itis inferred that both of these phases exhibit spin-glass-like behaviour.The magnetic properties and structure dependence of the Pr5Si2Ge2 canbe elucidated well using the Ruderman–Kittel–Kasuya–Yosida model.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
