Magnetic susceptibility and electrical resistivity of Ni-Al alloys at high temperatures

The thermoelectric properties of Nb-doped Zn4Sb3 compounds, (Zn1–xNbx)4Sb3 (x = 0, 0.005, and 0.01), were investigated at temperatures ranging from 300 to 685 K. The results showed that by substituting Zn with Nb, the thermal conductivities of all the Nb-doped compounds were lower than that of the pristine β-Zn4Sb3. Among the compounds studied, the lightly substituted (Zn0.995Nb0.005)4Sb3 compound exhibited the best thermoelectric performance due to the improvement in both its electrical resistivity and thermal conductivity. Its figure of merit, ZT, was greater than the undoped Zn4Sb3 compound for the temperature range investigated. In particular, the ZT of (Zn0.995Nb0.005)4Sb3 reached a value of 1.1 at 680 K, which was 69% greater than that of the undoped Zn4Sb3 obtained in this study.

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MAGNETIC BEHAVIOUR OF UPdAl, UCuGa AND UCuSn

International Journal of Modern Physics B ◽

10.1142/s0217979293001815 ◽

1993 ◽

Vol 07 (01n03) ◽

pp. 850-854 ◽

Cited By ~ 4

Author(s):

V.H. TRAN ◽

R. TROĆ

Keyword(s):

Electrical Resistivity ◽

Magnetic Susceptibility ◽

Low Temperatures ◽

Magnetic Behaviour ◽

Type Structure ◽

Complex Structures ◽

Temperature Dependent ◽

Antiferromagnetic Ordering

Magnetic susceptibility and electrical resistivity have been measured on UCuGa, UCu1+xSn1−x, (x=0 and 0.1), and UPdAl. The first two compounds, crystallizing in the hexagonal CaIn2-type structure, show at low temperatures an antiferromagnetic ordering probably with complex structures. UPdAl, which adopts the orthorhombic TiNiSi-type structure, was found to be a weakly temperature-dependent paramagnet down to 4.2 K.

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Synthesis, Structure and Magnetism of ErCoIn5

MRS Proceedings ◽

10.1557/proc-848-ff3.7 ◽

2004 ◽

Vol 848 ◽

Author(s):

Evan Lyle Thomas ◽

Erin E. Erickson ◽

Monica Moldovan ◽

David P. Young ◽

Julia Y. Chan

Keyword(s):

Magnetic Properties ◽

Electrical Resistivity ◽

Magnetic Susceptibility ◽

Single Crystal ◽

Experimental Results ◽

Flux Growth ◽

X Ray Diffraction ◽

Metallic Behavior ◽

X Ray ◽

Growth Method

AbstractA new member of the LnMIn5 family, ErCoIn5, has been synthesized by a flux-growth method. The structure of ErCoIn5 was determined by single crystal X-ray diffraction. It crystallizes in the tetragonal space group P4/mmm, Z = 1, with lattice parameters a = 4.5400(4) and c = 7.3970(7) Å, and V = 152.46(2) Å3. Electrical resistivity data show metallic behavior. Magnetic susceptibility measurements show this compound to be antiferromagnetic with TN = 5.1 K. We compare these experimental results with those of LaCoIn5 in an effort to better understand the effect of the structural trends observed on the transport and magnetic properties.

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Geology and geophysics at the archeological park of Vulci (central Italy)

Annals of Geophysics ◽

10.4401/ag-6361 ◽

2014 ◽

Vol 57 (1) ◽

Author(s):

Marco Marchetti ◽

Vincenzo Sapia ◽

Adriano Garello ◽

Donatella De Rita ◽

Alessandra Venuti

Keyword(s):

Electrical Resistivity ◽

Magnetic Susceptibility ◽

Cultural Heritage ◽

Central Italy ◽

Geophysical Methods ◽

Archaeological Sites ◽

Local Authorities ◽

Resistivity Tomography ◽

Geological Information ◽

Geological Map

<p>The Vulci archeological site was object of interest by the Soprintendenza ai beni culturali dell’Etruria meridionale (Italian government department responsible for southern Etruria’s cultural heritage) since the beginning of the 20th century. In 2001, the Ministero dei Beni Culturali (Italian ministry of cultural heritage) along with the local authorities, opened a natural-archeological park. In this area, it lies most of the ancient Etruscan city of Velch (today known by its Latin name, Vulci) including the Osteria Necropolis that is the object of this study. Recently, new archaeological excavations were made and the local authorities needed major geological information about the volcanic lithotypes where the Etruscans used to build their necropolis. The aim of this study is to define the geological and geophysical characteristics of the rock lithotypes present in the Vulci park. For this purpose, a geological map of the area (1:10000) has been realized. Moreover, two different geophysical methods were applied: measurements of magnetic susceptibility and electrical resistivity tomography. Magnetic susceptibility analyses clearly identify magnetic contrasts between different lithotypes; the characteristics of the pyroclastic flow that originated the Sorano unit 2 and its vertical facies variations are well recorded by this parameter that along with lithostratigraphic observations provides information about the depositional conditions. Two electrical resistivity tomographies were performed, which show the Sorano unit 2 thickness to be of c. 7 m with resistivity values ranging from 200 to 400 Ω·m. This kind of multidisciplinary approach resulted to be suitable to study this type of archaeological sites, revealing that areas characterized by a relevant thickness and wide areal extension of volcanic lithotypes can be a potential site where Etruscans might have excavated their necropolis.</p>

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Studies on the Oxidation of Fe-Al Alloys in Carbon Dioxide at High-Temperatures (1st Report)

Journal of the Japan Institute of Metals and Materials ◽

10.2320/jinstmet1952.30.10_995 ◽

1966 ◽

Vol 30 (10) ◽

pp. 995-1000 ◽

Cited By ~ 3

Author(s):

Gorô Itô ◽

Seiichi Ikeda

Keyword(s):

Carbon Dioxide ◽

High Temperatures ◽

Al Alloys

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