All Outputs (63)

All-Inorganic Perovskite Solar Cells With Both High Open-Circuit Voltage and Stability (2020)
Journal Article
Zhang, L., Hu, T., Li, J., Zhang, L., Li, H., Lu, Z., & Wang, G. (2020). All-Inorganic Perovskite Solar Cells With Both High Open-Circuit Voltage and Stability. Frontiers in Materials, 6, Article 330. https://doi.org/10.3389/fmats.2019.00330

Metal halide perovskite solar cells based on all-inorganic CsPbBr3 have attracted considerable attentions recently, due to their high open-circuit voltage and good stability. However, the fabrication of CsPbBr3 film is limited by the poor solubility... Read More about All-Inorganic Perovskite Solar Cells With Both High Open-Circuit Voltage and Stability.

Lead-free (Ba,Sr)TiO3 – BiFeO3 based multilayer ceramic capacitors with high energy density (2019)
Journal Article
Wang, G., Lu, Z., Li, J., Ji, H., Yang, H., Li, L., …Reaney, I. M. (2020). Lead-free (Ba,Sr)TiO3 – BiFeO3 based multilayer ceramic capacitors with high energy density. Journal of the European Ceramic Society, 40(4), 1779-1783. https://doi.org/10.1016/

High recoverable energy density (10 J cm−3) multilayers have been fabricated from lead-free 0.61BiFeO3-0.33(Ba0.8Sr0.2)TiO3-0.06La(Mg2/3Nb1/3)O3 ceramics. High breakdown strength > 730 kV cm-1 was achieved through the optimisation of multilayer proce... Read More about Lead-free (Ba,Sr)TiO3 – BiFeO3 based multilayer ceramic capacitors with high energy density.

Spin-wave directional anisotropies in antiferromagnetic Ba3NbFe3Si2O14 (2019)
Journal Article
Stock, C., Johnson, R. D., Giles-Donovan, N., Songvilay, M., Rodriguez-Rivera, J. A., Lee, N., …Cheong, S. (2019). Spin-wave directional anisotropies in antiferromagnetic Ba3NbFe3Si2O14. Physical Review B, 100(13), https://doi.org/10.1103/physrevb.100.1

Ba3NbFe3Si2O14 (langasite) is structurally and magnetically single-domain chiral with the magnetic helicity induced through competing symmetric exchange interactions. Using neutron scattering, we show that the spin waves in antiferromagnetic langasit... Read More about Spin-wave directional anisotropies in antiferromagnetic Ba3NbFe3Si2O14.

Spin fluctuation anisotropy as a probe of orbital-selective hole-electron quasiparticle excitations in detwinned Ba(Fe1−xCox)2As2 (2019)
Journal Article
Tian, L., Liu, P., Xu, Z., Li, Y., Lu, Z., Walker, H. C., …Dai, P. (2019). Spin fluctuation anisotropy as a probe of orbital-selective hole-electron quasiparticle excitations in detwinned Ba(Fe1−xCox)2As2. Physical Review B, 100(13), https://doi.org/1

We use inelastic neutron scattering to study spin excitation anisotropy in mechanically detwinned Ba(Fe1−xCox)2As2 with x=0.048 and 0.054. Both samples exhibit a tetragonal-to-orthorhombic structural transition at Ts, a collinear static antiferromagn... Read More about Spin fluctuation anisotropy as a probe of orbital-selective hole-electron quasiparticle excitations in detwinned Ba(Fe1−xCox)2As2.

Frequency and temperature independent (Nb0.5Ga0.5)x(Ti0.9Zr0.1)1-xO2 ceramics with giant dielectric permittivity and low loss (2019)
Journal Article
Xia, W., Liu, Y., Wang, G., Li, J., Cao, C., Hu, Q., …Wang, D. (2020). Frequency and temperature independent (Nb0.5Ga0.5)x(Ti0.9Zr0.1)1-xO2 ceramics with giant dielectric permittivity and low loss. Ceramics International, 46(3), 2954-2959. https://doi.o

Nb5+ and Ga3+ co-doped Ti0.9Zr0.1O2 ceramics were synthesized using the conventional solid-state reaction method. Single rutile-liked phase of octahedron structure were identified for all compositions in (Nb0.5Ga0.5)x(Ti0.9Zr0.1)1-xO2 (NGT) with x = ... Read More about Frequency and temperature independent (Nb0.5Ga0.5)x(Ti0.9Zr0.1)1-xO2 ceramics with giant dielectric permittivity and low loss.

Origin of the large electrostrain in BiFeO3-BaTiO3 based lead-free ceramics (2019)
Journal Article
Wang, G., Fan, Z., Murakami, S., Lu, Z., Hall, D. A., Sinclair, D. C., …Reaney, I. M. (2019). Origin of the large electrostrain in BiFeO3-BaTiO3 based lead-free ceramics. Journal of Materials Chemistry A, 7(37), 21254-21263. https://doi.org/10.1039/c9ta

High electrostrain and breakdown strength (1 − x)BiFeO3-0.3BaTiO3-xNd(Li0.5Nb0.5)O3 (BF-BT-xNLN) ceramics were studied by in situ synchrotron X-ray diffraction (XRD) in combination with Rietveld refinement and conventional transmission electron micro... Read More about Origin of the large electrostrain in BiFeO3-BaTiO3 based lead-free ceramics.

Finite field regime for a quantum spin liquid in α−RuCl3 (2019)
Journal Article
Balz, C., Lampen-Kelley, P., Banerjee, A., Yan, J., Lu, Z., Hu, X., …Nagler, S. E. (2019). Finite field regime for a quantum spin liquid in α−RuCl3. Physical Review B, 100(6), https://doi.org/10.1103/physrevb.100.060405

An external magnetic field can induce a transition in α−RuCl3 from an ordered zigzag state to a disordered state that is possibly related to the Kitaev quantum spin liquid. Here, we present field-dependent inelastic neutron scattering and magnetocalo... Read More about Finite field regime for a quantum spin liquid in α−RuCl3.

Electric field‐induced irreversible relaxor to ferroelectric phase transformations in Na0.5Bi0.5TiO3-NaNbO3 ceramics (2019)
Journal Article
Wang, G., Lu, Z., Zhang, Z., Feteira, A., Tang, C. C., & Hall, D. A. (2019). Electric field‐induced irreversible relaxor to ferroelectric phase transformations in Na0.5Bi0.5TiO3-NaNbO3 ceramics. Journal of the American Ceramic Society, 102(12), 7746-775

(1-x)Na0.5Bi0.5TiO3-xNaNbO3 (x = 0.02, 0.04, 0.06, and 0.08) ceramics were fabricated by solid-state reaction. High-resolution synchrotron x-ray powder diffraction (SXPD) data, coupled with macroscopic electromechanical measurements, reveal the occur... Read More about Electric field‐induced irreversible relaxor to ferroelectric phase transformations in Na0.5Bi0.5TiO3-NaNbO3 ceramics.

Evolution of the propagation vector of antiferroquadrupolar phases in Ce3Pd20Si6 under magnetic field (2019)
Journal Article
Portnichenko, P. Y., Nikitin, S. E., Prokofiev, A., Paschen, S., Mignot, J., Ollivier, J., …Inosov, D. S. (2019). Evolution of the propagation vector of antiferroquadrupolar phases in Ce3Pd20Si6 under magnetic field. Physical Review B, 99(21), https://d

Hidden-order phases that occur in a number of correlated f-electron systems are among the most elusive states of electronic matter. Their investigations are hindered by the insensitivity of standard physical probes, such as neutron diffraction, to th... Read More about Evolution of the propagation vector of antiferroquadrupolar phases in Ce3Pd20Si6 under magnetic field.

Ba8MnNb6O24: A model two-dimensional spin-5/2 triangular lattice antiferromagnet (2019)
Journal Article
Rawl, R., Ge, L., Lu, Z., Evenson, Z., Dela Cruz, C. R., Huang, Q., …Ma, J. (2019). Ba8MnNb6O24: A model two-dimensional spin-5/2 triangular lattice antiferromagnet. Physical Review Materials, 3(5), https://doi.org/10.1103/physrevmaterials.3.054412

We successfully synthesized and characterized the triangular lattice antiferromagnet Ba8MnNb6O24, which comprises equilateral spin-5/2Mn2+ triangular layers separated by six nonmagnetic Nb5+ layers. The detailed susceptibility, specific heat, elastic... Read More about Ba8MnNb6O24: A model two-dimensional spin-5/2 triangular lattice antiferromagnet.

Unconventional Antiferromagnetic Quantum Critical Point in Ba(Fe0.97Cr0.03)2(As1−xPx)2 (2019)
Journal Article
Zhang, W., Wei, Y., Xie, T., Liu, Z., Gong, D., Ma, X., …Li, S. (2019). Unconventional Antiferromagnetic Quantum Critical Point in Ba(Fe0.97Cr0.03)2(As1−xPx)2. Physical review letters, 122(3), https://doi.org/10.1103/physrevlett.122.037001

We have systematically studied physical properties of Ba(Fe0.97Cr0.03)2(As1−xPx)2, where superconductivity in BaFe2(As1−xPx)2 is fully suppressed by just 3% of Cr substitution of Fe. A quantum critical point is revealed at x∼0.42, where non-Fermi-liq... Read More about Unconventional Antiferromagnetic Quantum Critical Point in Ba(Fe0.97Cr0.03)2(As1−xPx)2.

Lattice distortion effects on the frustrated spin-1 triangular-antiferromagnet A3NiNb2O9 (A=Ba, Sr, and Ca) (2018)
Journal Article
Lu, Z., Ge, L., Wang, G., Russina, M., Günther, G., dela Cruz, C. R., …Ma, J. (2018). Lattice distortion effects on the frustrated spin-1 triangular-antiferromagnet A3NiNb2O9 (A=Ba, Sr, and Ca). Physical Review B, 98(9), https://doi.org/10.1103/physrev

In geometrically frustrated materials with low-dimensional and small spin moment, the quantum fluctuation can interfere with the complicated interplay of the spin, electron, lattice, and orbital interactions, and host exotic ground states such as the... Read More about Lattice distortion effects on the frustrated spin-1 triangular-antiferromagnet A3NiNb2O9 (A=Ba, Sr, and Ca).

Decoupled spin dynamics in the rare-earth orthoferrite YbFeO3: Evolution of magnetic excitations through the spin-reorientation transition (2018)
Journal Article
Nikitin, S. E., Wu, L. S., Sefat, A. S., Shaykhutdinov, K. A., Lu, Z., Meng, S., …Podlesnyak, A. (2018). Decoupled spin dynamics in the rare-earth orthoferrite YbFeO3: Evolution of magnetic excitations through the spin-reorientation transition. Physical

In this paper, we present a comprehensive study of magnetic dynamics in the rare-earth orthoferrite YbFeO3 at temperatures below and above the spin-reorientation (SR) transition TSR=7.6K, in magnetic fields applied along the a,b, and c axes. Using si... Read More about Decoupled spin dynamics in the rare-earth orthoferrite YbFeO3: Evolution of magnetic excitations through the spin-reorientation transition.

The nature of spin excitations in the one-third magnetization plateau phase of Ba3CoSb2O9 (2018)
Journal Article
Kamiya, Y., Ge, L., Hong, T., Qiu, Y., Quintero-Castro, D. L., Lu, Z., …Ma, J. (2018). The nature of spin excitations in the one-third magnetization plateau phase of Ba3CoSb2O9. Nature Communications, 9(1), Article 2666 (2018). https://doi.org/10.1038/s

Magnetization plateaus in quantum magnets—where bosonic quasiparticles crystallize into emergent spin superlattices—are spectacular yet simple examples of collective quantum phenomena escaping classical description. While magnetization plateaus have... Read More about The nature of spin excitations in the one-third magnetization plateau phase of Ba3CoSb2O9.

MultiFLEXX - The new multi-analyzer at the cold triple-axis spectrometer FLEXX (2017)
Journal Article
Groitl, F., Toft-Petersen, R., Quintero-Castro, D. L., Meng, S., Lu, Z., Huesges, Z., …Habicht, K. (2017). MultiFLEXX - The new multi-analyzer at the cold triple-axis spectrometer FLEXX. Scientific Reports, 7(1), Article 13637. https://doi.org/10.1038/s

The first experimental characterization of a multiple energy analysis wide angle backend for a cold triple-axis spectrometer is reported. The multi-analyzer module MultiFLEXX employs 155 detection channels which simultaneously probe an extensive rang... Read More about MultiFLEXX - The new multi-analyzer at the cold triple-axis spectrometer FLEXX.

Crystal growth and phase diagram of 112-type iron pnictide superconductor Ca1−yLayFe1−xNixAs2 (2017)
Journal Article
Xie, T., Gong, D., Zhang, W., Gu, Y., Huesges, Z., Chen, D., …Luo, H. (2017). Crystal growth and phase diagram of 112-type iron pnictide superconductor Ca1−yLayFe1−xNixAs2. Superconductor Science and Technology, 30(9), Article 095002. https://doi.or

We report a systematic crystal growth and characterization of Ca1−yLayFe1−xNixAs2, the newly discovered 112-type iron-based superconductor. After substituting Fe by a small amount of Ni, bulk superconductivity is successfully obtained in high-quality... Read More about Crystal growth and phase diagram of 112-type iron pnictide superconductor Ca1−yLayFe1−xNixAs2.

Protocols for the Fabrication, Characterization, and Optimization of n-Type Thermoelectric Ceramic Oxides (2016)
Journal Article
Boston, R., Schmidt, W. L., Lewin, G. D., Iyasara, A. C., Lu, Z., Zhang, H., …Reaney, I. M. (2017). Protocols for the Fabrication, Characterization, and Optimization of n-Type Thermoelectric Ceramic Oxides. Chemistry of Materials, 29(1), 265-280. https:

The development of oxides with high figure of merit, ZT, at modest temperatures (∼300–500 °C) is desirable for ceramic-based thermoelectric generator technology. Although ZT is a compound metric with contributions from thermal conductivity (κ), Seebe... Read More about Protocols for the Fabrication, Characterization, and Optimization of n-Type Thermoelectric Ceramic Oxides.

High-Figure-of-Merit Thermoelectric La-Doped A-Site-Deficient SrTiO3 Ceramics (2016)
Journal Article
Lu, Z., Zhang, H., Lei, W., Sinclair, D. C., & Reaney, I. M. (2016). High-Figure-of-Merit Thermoelectric La-Doped A-Site-Deficient SrTiO3 Ceramics. Chemistry of Materials, 28(3), 925-935. https://doi.org/10.1021/acs.chemmater.5b04616

The structure and thermoelectric (TE) properties of La-doped, A-site-deficient SrTiO3 (Sr1–3x/2LaxTiO3) ceramics sintered in air and N2/5% H2 have been investigated. Air-sintered ceramics with 0.10 ≤ x < 0.30 appear cubic by X-ray diffraction (XRD) b... Read More about High-Figure-of-Merit Thermoelectric La-Doped A-Site-Deficient SrTiO3 Ceramics.

The Influence of La Doping and Heterogeneity on the Thermoelectric Properties of Sr3Ti2O7 Ceramics (2015)
Journal Article
Lu, Z., Sinclair, D. C., & Reaney, I. M. (2016). The Influence of La Doping and Heterogeneity on the Thermoelectric Properties of Sr3Ti2O7 Ceramics. Journal of the American Ceramic Society, 99(2), 515-522. https://doi.org/10.1111/jace.13998

La-doping mechanisms and thermoelectric properties of Sr3Ti2O7 Ruddlesden–Popper (RP) ceramics sintered under air and flowing 5% H2 at 1773 K for 6 h have been investigated. Changes in lattice parameters and conductivity revealed a limited interstiti... Read More about The Influence of La Doping and Heterogeneity on the Thermoelectric Properties of Sr3Ti2O7 Ceramics.

Oxygen-loss in A-site deficient Sr0.85La0.10TiO3 perovskite (2014)
Journal Article
Akin, I., Li, M., Lu, Z., & Sinclair, D. C. (2014). Oxygen-loss in A-site deficient Sr0.85La0.10TiO3 perovskite. RSC Advances, 4(61), 32549-32554. https://doi.org/10.1039/c4ra04199b

The electrical properties of Sr1−3xLa2xTiO3 ceramics (x = 0.05, LST) change dramatically with sintering temperature and atmosphere. Ceramics sintered at 1200 °C in both O2 and N2 exhibit near intrinsic band-type conduction with bulk conductivity ∼10−... Read More about Oxygen-loss in A-site deficient Sr0.85La0.10TiO3 perovskite.