Reinvestigation the Thermal and Electrical Transport Properties of Tl7Sb2

2013 ◽  
Vol 802 ◽  
pp. 284-288
Author(s):  
Anek Charoenphakdee ◽  
Adul Harnwangmuang ◽  
Tosawat Seetawan ◽  
Chesta Ruttanapun ◽  
Vittaya Amornkitbamrung ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Transport Properties ◽  
Electrical Transport ◽  
Room Temperature ◽  
Lattice Parameter ◽  
Electronic Contribution ◽  
Electrical Transport Properties ◽  
Space Group ◽  
Crystal System ◽  
Thallium Compounds

The authors examined the thermal and electrical transport properties of Tl7Sb2 at temperatures ranging from room temperature to 400 K. The crystal system of Tl7Sb2 is cubic with the lattice parameter a = 1.16053 nm and the space group is Im3m. The polycrystalline samples were prepared by melting stoichiometric amounts of thallium and antimony. Although, usually the thermal conductivity of thallium compounds is very low (<1 Wm-1K-1), that of Tl7Sb2 was relatively high (~13 Wm-1K-1 at room temperature). This is because of the large electronic contribution to the thermal conductivity.

Designing Si/Si1−xGex Superlattices With Tailored Thermal Transport Properties

2008 ◽  
Author(s):  
E. S. Landry ◽  
A. J. H. McGaughey
Keyword(s):  
Thermal Conductivity ◽  
Experimental Study ◽  
Transport Properties ◽  
Electrical Transport ◽  
Design Space ◽  
Phonon Transport ◽  
Atomistic Modeling ◽  
Electrical Transport Properties ◽  
Modeling Tools ◽  
Thermoelectric Energy

Si/Si1−xGex superlattices are promising candidates for thermoelectric energy conversion applications [1, 2], as the phonon transport through them can be inhibited while maintaining desirable electrical transport properties. No comprehensive experimental study has been performed to map the thermal conductivity design space accessible by Si/Ge nanocomposites. By using atomistic modeling tools, interesting areas of the design space can be identified and then further explored experimentally.

Ambipolar Transport Behaviors in Fullerene Peapod Transistors

2007 ◽  
Vol 121-123 ◽  
pp. 521-524 ◽  
Author(s):  
Ao Guo ◽  
Yun Yi Fu ◽  
Lun Hui Guan ◽  
Zu Jin Shi ◽  
Zhen Nan Gu ◽  
...  
Keyword(s):  
Transport Properties ◽  
Electrical Transport ◽  
Field Effect ◽  
Room Temperature ◽  
Field Effect Transistors ◽  
Large Percentage ◽  
C60 Fullerene ◽  
Electrical Transport Properties ◽  
Ambipolar Behavior ◽  
Ambipolar Transport

The electrical transport properties of C70 and C60 fullerene peapods are investigated. We report the fabrications and performances of field-effect transistors (FETs) based on C70 and C60 fullerene peapods. A large percentage of the fullerene peapod-FETs we fabricated exhibit ambipolar characteristics with high Ion/Ioff ratio at room temperature in air. The origin of ambipolar behavior is qualitatively discussed.

Anomalous electrical transport properties of PVA-Ag composite films below room temperature

2012 ◽  
Vol 33 (11) ◽  
pp. 1941-1950 ◽  
Author(s):  
Pankaj Ghosh ◽  
Somenath Ghatak ◽  
Mrinal K. Mandal ◽  
Ajit Kumar Meikap
Keyword(s):  
Transport Properties ◽  
Electrical Transport ◽  
Room Temperature ◽  
Composite Films ◽  
Electrical Transport Properties

scholarly journals Magnetic and Electrical Transport Properties of Double Perovskite Sr2FeMoO6Prepared by Sol-Gel Method

2011 ◽  
Vol 8 (s1) ◽  
pp. S189-S194 ◽  
Author(s):  
Yong-Qing Zhai ◽  
Jing Qiao ◽  
Zhang Zhang
Keyword(s):  
Transport Properties ◽  
Electrical Transport ◽  
Room Temperature ◽  
Sol Gel ◽  
Double Perovskite ◽  
Reducing Agent ◽  
Perovskite Oxide ◽  
Electrical Transport Properties ◽  
Gel Method ◽  
Sol Gel Method

With activated carbon for reducing agent, the sol-gel method was used to prepare the giant magnetoresistance materials Sr2FeMoO6, which is the double Perovskite oxide. The structure, morphology, magnetic and electrical transport properties were investigated respectively by x-ray diffraction, scanning electron microscopy and vibrating sample magnetometer. The as-synthesized sample is Sr2FeMoO6with tetragonal crystal structure and I4/mmm space group and unit cell parameter is a = 5.580Å, c = 7.882Å. The primary particles are spherical in shape and the grain size is below 100 nm. The curie temperature is above room temperature and the saturation magnetization is 13.321 A·m2/kg under 1.0 T at room temperature. The sample exhibit typical semiconductor behavior and the conductive mechanism can be described by small polaron variable range hopping model. The room temperature magnetoresistance of the sample under 1.0 T field is up to -10.02%. Moreover, it is found the dosage of citric acid and the amount of reducing agent has great effect on the phase structure and magnetic properties of the samples.

Sign in / Sign up

Export Citation Format

Share Document