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Role of disorder in magnetic and conducting properties of U–Mo and U–Mo–H thin films
- Source :
- Materials Chemistry and Physics. 260:124069
- Publication Year :
- 2021
- Publisher :
- Elsevier BV, 2021.
-
Abstract
- Crystal structure, magnetic and electrical properties of thin U–Mo films and their hydrides prepared by reactive sputter deposition from metallic targets were studied. The films are metallic but with high values of electrical resistivity. Both bcc U0.79Mo0.21 thin film and the hydride (UH3)0.74Mo0.26 (β-UH3 structure type) have a very strong texture. Superconductivity is identified below Tc = 0.55 K for U0.79Mo0.21. The critical field of 1.0 T is exceeding that of α-U (0.3 T). The hydride film (UH3)0.74Mo0.26 is a ferromagnet with the Curie temperature TC = 165 K, higher concentration of Mo somewhat reduces the TC value. Deposition on a cooled substrate reduces the grain size of the hydride, approaching the limit of amorphous state. The U–Mo films and hydrides exhibit the net negative temperature coefficient of resistivity, TCR = dρ/dT, attributed to the randomness on atomic scale, yielding very strong scattering of electrons and weak localization.
- Subjects :
- Materials science
Condensed matter physics
Hydride
02 engineering and technology
Sputter deposition
010402 general chemistry
021001 nanoscience & nanotechnology
Condensed Matter Physics
01 natural sciences
0104 chemical sciences
Amorphous solid
Weak localization
Curie temperature
General Materials Science
Texture (crystalline)
Thin film
0210 nano-technology
Critical field
Subjects
Details
- ISSN :
- 02540584
- Volume :
- 260
- Database :
- OpenAIRE
- Journal :
- Materials Chemistry and Physics
- Accession number :
- edsair.doi...........1700ae5f22de6dd412b0f01d81f3fc04