Browsing by Author "Rodriguez, Sergio Y."

Now showing items 1-6 of 6

    • Dilute magnetism and vibrational entropy in Fe2Al5 
      Chi, Ji; Zheng, Xiang; Rodriguez, Sergio Y.; Li, Yang; Gou, Weiping; Rathnayaka, K. D. D.; Ross, Joseph H. Jr. (American Physical Society, 2010)
      Fe2Al5 contains a Fe-Al matrix through which are threaded disordered one-dimensional chains of overlapping Al sites. We report magnetic, nuclear-magnetic-resonance (NMR), and specific-heat measurements addressing its ...
    • NMR and Computational Study of Ba8CuxGe46-x clathrate semiconductors 
      Chen, Jing-Han; Sirusi Arvij, Ali; Zheng, Xiang; Rodriguez, Sergio Y.; Ross, Joseph H. Jr. (Elsevier, 2014)
      Ba8CuxGe46-x is a type-I clathrate material that forms as a semiconductor in a narrow composition range corresponding to the electron-balanced Zintl composition, with x = 5.3. We use NMR spectroscopy combined with ab initio ...
    • NMR experiments and electronic structure calculations in Type-I BaAlGe clathrates 
      Gou, Weiping; Rodriguez, Sergio Y.; Li, Yang; Ross, Joseph H. Jr. (American Physical Society, 2009)
      We describe A27l NMR experiments on Ba8AlxGe46−x type-I clathrates coupled with ab initio computational studies. For x=16, calculated spectra determined by the ab initio results gave good agreement with the measurements, ...
    • NMR relaxation and rattling phonons in the type-I Ba 8 Ga 16 Sn 30 clathrate 
      Zheng, Xiang; Rodriguez, Sergio Y.; Ross, Joseph H. (Physical Review B - Condensed Matter and Materials Physics, 2011)
    • NMR relaxation and rattling phonons in type-I Ba8Ga16Sn30 clathrate 
      Zheng, Xiang; Rodriguez, Sergio Y.; Ross, Joseph H. Jr. (American Physical Society, 2011)
      Atomic motion of guest atoms inside semiconducting clathrate cages is considered an important source for glasslike thermal behavior. 69Ga and 71Ga nuclear magnetic resonance studies on type I Ba8Ga16Sn30 show a clear ...
    • Transport and thermodynamic properties under anharmonic motion in type-I Ba8Ga16Sn30 clathrate 
      Zheng, Xiang; Rodriguez, Sergio Y.; Saribaev, Laziz; Ross, Joseph H. Jr. (American Physical Society, 2012)
      Anharmonic guest atom oscillation has direct connection to the thermal transport and thermoelectric behavior of type-I Ba8Ga16Sn30 clathrates. This behavior can be observed through several physical properties, with for ...