Chromium–niobium co-doped vanadium dioxide films: Large temperature coefficient of resistance and practically no thermal hysteresis of the metal–insulator transition

Journal Article · Sun May 15 04:00:00 EDT 2016 · AIP Advances

DOI:https://doi.org/10.1063/1.4949757· OSTI ID:22611696

Miyazaki, Kenichi ^[1]; Shibuya, Keisuke; Sawa, Akihito ^[2]; Suzuki, Megumi; Sakai, Kenichi ^[1]; Fujita, Jun-ichi ^[3]

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1. Denso Corporation, Aichi 470-0111 (Japan)
2. National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba 305-8565 (Japan)
3. University of Tsukuba, Tsukuba 305-8571 (Japan)

We investigated the effects of chromium (Cr) and niobium (Nb) co-doping on the temperature coefficient of resistance (TCR) and the thermal hysteresis of the metal–insulator transition of vanadium dioxide (VO{sub 2}) films. We determined the TCR and thermal-hysteresis-width diagram of the V{sub 1−x−y}Cr{sub x}Nb{sub y}O{sub 2} films by electrical-transport measurements and we found that the doping conditions x ≳ y and x + y ≥ 0.1 are appropriate for simultaneously realizing a large TCR value and an absence of thermal hysteresis in the films. By using these findings, we developed a V{sub 0.90}Cr{sub 0.06}Nb{sub 0.04}O{sub 2} film grown on a TiO{sub 2}-buffered SiO{sub 2}/Si substrate that showed practically no thermal hysteresis while retaining a large TCR of 11.9%/K. This study has potential applications in the development of VO{sub 2}-based uncooled bolometers.

• OSTI ID: 22611696
• Journal Information: AIP Advances, Journal Name: AIP Advances Journal Issue: 5 Vol. 6; ISSN AAIDBI; ISSN 2158-3226
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BOLOMETERS
BUFFERS
CHROMIUM ADDITIONS
DOPED MATERIALS
ELECTRIC CONDUCTIVITY
FILMS
HYSTERESIS
NIOBIUM ADDITIONS
PHASE TRANSFORMATIONS
SILICON OXIDES
SUBSTRATES
TEMPERATURE COEFFICIENT
TITANIUM OXIDES
VANADIUM OXIDES