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Cubic phase stability, optical and magnetic properties of Cu-stabilized zirconia nanocrystals

Journal Article · · Journal of Physics. D, Applied Physics
By means of experimental and ab initio investigations, in this article we report on the cubic phase stability of Cu doped zirconia (ZrO2) at room temperature, and further characterize its structural, optical and magnetic properties. Various compositions of Zr1–xCuxO2 (0.01 ≤ x ≤ 0.25) nanocrystallites of average size ~16 nm were synthesized using co-precipitation technique. Thermal analysis and kinetics of crystallization revealed that the cubic phase at ambient temperature can be stabilized by using a critical calcination temperature of 500 °C for 8 h in air and a critical composition of $$x_c$$ = 0.10 ± 0.05. For $$x < x_c$$, some undigested monoclinic phase of ZrO2 exists together with the cubic structure. However, for $$x > x_c$$, the monoclinic CuO emerges as a secondary phase with shrinkage of unit-cell volume with increasing the Cu content. At x = 0.05 and 500 °C calcination temperature, we observe a high degree of cubic crystallinity which breaks down into monoclinic phase with increasing calcination temperature beyond 550 °C. Electron magnetic resonance studies provide evidence for the substitution of Cu2+ (2D5/9,3d9) ions at Zr4+ sites with g = 2.250, g = 2.018 and average ga = (g + 2g)/3 ~ 2.1. The temperature dependence of magnetic susceptibility measurements from 2 K to 300 K exhibits Curie–Weiss behaviour whose analysis using ga = 2.1 and spin S = 1/2 yields x = 0.028 and x = 0.068 for the nominal x = 0.05 and x = 0.20 samples, respectively. This magnetic analysis confirms the findings from x-ray diffraction that only a part of Cu is successfully doped into cubic phase of Cu-doped ZrO2. The optical bandgap decreases with increasing x, which is due to the emergence of Cu-d states at Fermi-level near the valence bands, thus making Cu-doped zirconia a hole doped (p-type) semiconductor.
Research Organization:
West Virginia Univ., Morgantown, WV (United States)
Sponsoring Organization:
National Science Foundation (NSF); USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0016176
OSTI ID:
1594022
Alternate ID(s):
OSTI ID: 1540402
OSTI ID: 23091791
Journal Information:
Journal of Physics. D, Applied Physics, Journal Name: Journal of Physics. D, Applied Physics Journal Issue: 22 Vol. 51; ISSN 0022-3727
Publisher:
IOP PublishingCopyright Statement
Country of Publication:
United States
Language:
English

References (59)

Electron Paramagnetic Resonance Study of Copper(II) Ions in Single Crystals of Thallium Magnesium Sulphate Hexahydrate journal February 1989
Electronic structure and optical properties of zirconia journal March 2000
ZrO2 and Cu/ZrO2 Sol?Gel Materials Spectroscopic Characterization journal January 2005
X-ray line broadening from filed aluminium and wolfram journal January 1953
Preparation and characterization of dispersed Rh2O3 on tetragonal ZrO2 journal July 1986
Preparation and characterization of members of the systems and journal December 1988
On the structural chemistry of zirconium oxide journal June 1982
Optical properties of cubic stabilized zirconia journal September 1992
Oxygen sensors journal June 1988
Influence of pH on the stability of low temperature t-ZrO2 journal June 1998
Electron Paramagnetic Resonance investigation of the nature of active species involved in carbon black oxidation on ZrO2 and Cu/ZrO2 catalysts journal January 2012
Synthesis and optical properties of yttria-doped ZrO2 nanopowders journal June 2008
In situ investigations of structure–activity relationships of a Cu/ZrO2 catalyst for the steam reforming of methanol journal July 2005
An overview of zirconia ceramics: Basic properties and clinical applications journal November 2007
Investigation of the vibrational properties of cubic yttria-stabilized zirconia: A combined experimental and theoretical study journal March 2014
Development of hafnium based high-k materials—A review journal July 2011
Absence of ferromagnetism in Mn- and Fe-stabilized zirconia nanoparticles journal December 2008
Elastic, electronic and thermal properties of YSZ from first principles journal January 2012
Thermodynamic Tetragonal Phase Stability in Sol−Gel Derived Nanodomains of Pure Zirconia journal March 2004
Thermal conductivity of dense and porous yttria-stabilized zirconia journal June 2001
Cu/ZnO and Cu/ZrO 2 interactions studied by contact angle measurement with TEM journal January 2007
The atomistic structure of yttria stabilised zirconia at 6.7 mol%: an ab initio study journal January 2016
Cu–ZrO2 nanocomposite catalyst for selective hydrogenation of levulinic acid and its ester to γ-valerolactone journal January 2012
Nature of magnetism in copper-doped oxides: ZrO2, TiO2, MgO, SiO2, Al2O3, and ZnO journal April 2008
On the resistive switching mechanisms of Cu/ZrO2:Cu/Pt journal December 2008
Effect of ZrOx/HfOx bilayer structure on switching uniformity and reliability in nonvolatile memory applications journal October 2010
Absence of ferromagnetism in Mn-doped tetragonal zirconia journal August 2011
Room temperature ferromagnetism in monoclinic Mn-doped ZrO 2 thin films journal April 2012
From zirconia to yttria: Sampling the YSZ phase diagram using sputter-deposited thin films journal February 2016
Size-dependent structural, magnetic, and optical properties of MnCo 2 O 4 nanocrystallites journal May 2017
Molecular dynamics calculations of anion diffusion in nitrogen-doped yttria-stabilized zirconia journal January 2007
Physical interpretation and accuracy of the Kubelka–Munk theory journal March 2007
Inhomogeneous Electron Gas journal November 1964
Self-Consistent Equations Including Exchange and Correlation Effects journal November 1965
Special points for Brillouin-zone integrations journal June 1976
Experimental and theoretical determination of the electronic structure and optical properties of three phases of ZrO 2 journal February 1994
Efficient iterative schemes for ab initio total-energy calculations using a plane-wave basis set journal October 1996
Structural properties and quasiparticle band structure of zirconia journal March 1998
Relative stability, structure, and elastic properties of several phases of pure zirconia journal January 1998
From ultrasoft pseudopotentials to the projector augmented-wave method journal January 1999
Ab initio study of structural and electronic properties of yttria-stabilized cubic zirconia journal January 1999
Theoretical investigation of nitrogen substitution in cubic zirconia journal April 2007
First-principles study of the effect of pressure on the five zirconia polymorphs. I. Structural, vibrational, and thermoelastic properties journal August 2010
First-principles study of the effect of pressure on the five zirconia polymorphs. II. Static dielectric properties and Raman spectra journal August 2010
Defect-induced ferromagnetism in undoped and Mn-doped zirconia thin films journal September 2010
Ferroelastic switching of doped zirconia: Modeling and understanding from first principles journal October 2014
Generalized Gradient Approximation Made Simple journal October 1996
Mn-Stabilized Zirconia: From Imitation Diamonds to a New Potential High- T C Ferromagnetic Spintronics Material journal January 2007
VESTA 3 for three-dimensional visualization of crystal, volumetric and morphology data journal October 2011
The crystal structure of baddeleyite (monoclinic ZrO2) journal July 1959
Nonpolar Nonvolatile Resistive Switching in Cu Doped $\hbox{ZrO}_{2}$ journal May 2008
The Cubic Field in the System CaO-ZrO 2 journal October 1968
Structure and Thermomechanical Properties of Partially Stabilized Zirconia in the CaO-ZrO2 System journal March 1972
Phase Analysis in Zirconia Systems journal June 1972
Subsolidus Phase Equilibria and Ordering in the System ZrO2-Y2O3 journal January 1983
Influence of Thermal Decomposition on the Mechanical Properties of Magnesia-Stabilized Cubic Zirconia journal May 1983
Size driven thermodynamic crossovers in phase stability in zirconia and hafnia journal September 2017
Indirect band gap in α‐ZrO 2 journal July 1990
Exploiting magnetic properties of Fe doping in zirconia: From first-principles simulations to the experimental growth and characterization of thin films journal May 2013

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