Article
Chemistry, Physical
Baris Avar, Tuncay Simsek, Sadan Ozcan, Arun K. Chattopadhyay, Bora Kalkan
Summary: Nanostructured (FeCoNi)(70)Ti10B20 alloy was synthesized by mechanical alloying process, with solid solution formation observed from the onset of milling. Crystallite size and lattice strains appeared stabilized after 20 hours of milling, while prolonged milling led to the formation of amorphous phase. High-pressure studies confirmed stability of the amorphous phase up to 30 GPa pressure, with improved soft magnetic properties observed after annealing at 350 degrees C.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Multidisciplinary
Ines C. B. Martins, Anders S. Larsen, Anders O. Madsen, Olivia Aalling Frederiksen, Alexandra Correia, Kirsten M. O. Jensen, Henrik S. Jeppesen, Thomas Rades
Summary: Polyamorphism is a controversial solid-state phenomenon that is still not fully understood. In this study, three distinct polyamorphic forms of hydrochlorothiazide were discovered and their interconversions were investigated. Molecular dynamics simulations revealed differences in dihedral angle distributions between two of the polyamorphs, which may explain their different physicochemical properties.
Article
Astronomy & Astrophysics
M. P. Roriz, C. B. Pereira, S. Junqueira, M. Lugaro, N. A. Drake, C. Sneden
Summary: We present detailed chemical compositions of four chemically peculiar stars on the first-ascent red giant branch, which lack high spectral resolution comprehensive analyses. These stars, BD+03 degrees 2688, HE 0457-1805, HE 1255-2324, and HE 2207-1746, exhibit a range in Galactic population membership with metallicities of [Fe/H] = -1.21, -0.19, -0.31, and -0.55, respectively. We obtained elemental abundances for 28 elements, including CNO group and C-12/C-13 ratios, as well as novel results for the heavy elements tungsten and thallium. All four stars show significant enhancements of neutron-capture elements, indicating enrichments from the slow neutron capture (s-process).
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Materials Science, Multidisciplinary
X. Y. Jiao, P. Y. Wang, Y. X. Liu, J. Wang, W. N. Liu, A. X. Wan, L. J. Shi, C. G. Wang, S. M. Xiong
Summary: The fracture behavior of a high pressure die casting AlSi10MnMg alloy with different porosity levels during plastic deformation is investigated using synchrotron radiation X-ray computed tomography. The results show that the origin and evolution of porosity play a crucial role in the cracking process, with different types of defects proposed in the alloy. The findings provide valuable insights into understanding the fracture behavior of high pressure die casting alloys.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Geochemistry & Geophysics
Wenhui Tan, Tobias M. Mueller, Jing Ba
Summary: Recent experimental evidence shows that in limestones with dual porosity structure, the effective pressure coefficient for pore volume exceeds unity, resulting in a negative unjacketed pore modulus and inhomogeneous deformation. While there may be measurement inaccuracies in changes of pore volume, the experimental observations can be reconciled with the constitutive poroelastic equations. A negative unjacketed pore modulus is deemed plausible, indicating a partial localization of elastic strain energy in the fluid space within the poroelasticity framework for micro-inhomogeneous rocks.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2021)
Article
Chemistry, Inorganic & Nuclear
Nataliya G. Spitsyna, Maxim A. Blagov, Vladimir A. Lazarenko, Roman D. Svetogorov, Yan Zubavichus, Leokadiya Zorina, Olga Maximova, Sergey A. Yaroslavtsev, Vyacheslav S. Rusakov, Grigory Raganyan, Eduard B. Yagubskii, Alexander N. Vasiliev
Summary: A potassium salt of the N2S2O2-coordination Fe(III) anion has been synthesized, characterized structurally and magnetically, and shown to exhibit a three-step cooperative spin-crossover transition. The study reveals unique phenomena during the spin-crossover process, such as unexpected changes in iron(III)-ligand bond lengths and a structural phase transition in the final step. This research provides a new platform for understanding the multistep spin-crossover character in Fe(III) thsa-complexes and related compounds.
INORGANIC CHEMISTRY
(2021)
Article
Nanoscience & Nanotechnology
Cai Jin, Xiaowen Li, Wenqiao Han, Qi Liu, Sixia Hu, Yanjiang Ji, Zedong Xu, Songbai Hu, Mao Ye, Meng Gu, Yuanmin Zhu, Lang Chen
Summary: Integrating materials characteristics through constructing artificial superlattices has led to the successful synthesis of BiFeO3/BiMnO3 SLs with considerable ferroelectric polarizations and tunable magnetic moments. The tunable magnetic moments of SLs are closely linked to the dimensionality of BiFeO3 layers, with the superexchange interaction of Fe-O-Mn in SLs tending towards antiferromagnetic rather than ferromagnetic as the dimensionality of BiFeO3 per period is reduced. This interlayer modulation effect in SLs offers an attractive way to precisely control multiple order parameters in a multiferroic oxide system.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Multidisciplinary
Cai Jin, Yuanmin Zhu, Xiaowen Li, Feng An, Wenqiao Han, Qi Liu, Sixia Hu, Yanjiang Ji, Zedong Xu, Songbai Hu, Mao Ye, Gaokuo Zhong, Meng Gu, Lang Chen
Summary: This study successfully synthesized super-flexible freestanding BiMnO3 membranes with both ferroelectricity and ferromagnetism, demonstrating their flexibility and stability during bending, paving the way for multifunctional flexible electronic devices.
Article
Multidisciplinary Sciences
Simone Tumiati, Marco Merlini, Andrea Amalfa, Marco Di Michiel, Luca Toffolo
Summary: This article describes a novel non-destructive method for the identification and quantitative estimation of volatile substances directly in sealed capsules. The method can be applied to the analysis of frozen water-CO2 mixtures.
SCIENTIFIC REPORTS
(2022)
Article
Chemistry, Physical
Jinbo Zhang, Weiwei Xia, Mingtao Li, Zhipeng Yan, Saqib Rahman, Xianghua Zeng, Lin Wang, Jaeyong Kim
Summary: The study investigates the effects of pressure on the crystal structure, band gap, and transport behavior of mixed-valence compound Sn3O4. The results show a transition in transport mechanism under pressure, with significant changes in band gap and resistance. These findings suggest potential applications in photocatalysis and provide insights for high-performance photoelectric device design.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Chang-Ding Qiu, Youcheng Hu, Kewei Cao, Xiangjiang Wu, Bi-Hong Huang, Jin Liu, Yun-Xiao Wang, Laibing Luo, Dong Gu, Xinping Ai, Yuliang Cao, Shengli Chen, Fu-Sheng Ke
Summary: This study proposes a method to completely suppress the shuttle effect of lithium polysulfides through in situ construction of a compact cathode electrolyte interphase (CEI) using vinylene carbonate (VC), bis(trifluoromethane)sulfonimide ions and LiPSs. This allows for long-term cycling stability and high-rate performance of the sulfur cathode in the electrolyte. The study reveals an appealing approach to tailored sulfur cathodes by in situ construction of a self-healing and high Li+ conductive CEI, effectively solving the shuttle effect issue.
ADVANCED ENERGY MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Tran Dinh Cuong, Anh D. Phan
Summary: The study introduces a theoretical model to investigate the melting behavior of MgO and successfully explains recent experimental data. The numerical analyses provided insights into planetary dynamics and evolution.
Article
Chemistry, Physical
Yaochang Yue, Jiyu Zhou, Qian Cheng, Xuning Zhang, Boxin Wang, Yanxun Li, Shilin Li, Ruiqi Cao, Kaiyuan Wang, Hui Wang, Huiqiong Zhou, Yuan Zhang
Summary: The introduction of new sterically hindered molecules can control the crystallization process of CsPbI2Br films, leading to the formation of dense and nonporous polycrystalline perovskite films with improved stability. As the number of cycloalkane rings increases, the hindrance for crystallization becomes more significant.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Materials Science, Multidisciplinary
Tomoko Nogusa, Christopher B. Cooper, Zhiao Yu, Yu Zheng, Yuran Shi, Zhenan Bao
Summary: This study found that hydrophobic perfluoropolyether (PFPE) dynamic polymers can act as effective underwater adhesives by enhancing van der Waals interactions and minimizing water uptake. The optimized bonding interactions and bulk dynamics of the polymers enable high cohesive strength while maintaining a hydrophobic, nanophase-separated morphology. The resulting adhesives can be reversibly applied to various substrates in fully underwater conditions without any solvent or covalent crosslinking.
Article
Materials Science, Multidisciplinary
Zimeng Hu, Hangfeng Zhang, Zhigang Zhu, Jiangtao Zeng, Dou Zhang, Mirva Eriksson, Giuseppe Viola, Haixue Yan
Summary: The majority of piezoelectric ceramics based on Pb(Zr, Ti)O-3 (PZT) exhibit hysteretic behavior, which varies depending on various factors. The ternary system 0.05Pb(Mn1/3Sb2/3)O-3-0.95Pb(Zr0.52Ti0.48)O-3 (5PMS-PZT) has shown attractive piezoelectric properties with superior thermal stability. This work further delves into the hysteretic aspects of 5PMS-PZT ceramics and describes unique hysteresis features influenced by various factors.
Article
Chemistry, Inorganic & Nuclear
Alexei A. Belik, Ran Liu, Lei Zhang, Noriki Terada, Masahiko Tanaka, Kazunari Yamaura
Summary: An A-site-ordered quadruple perovskite NdMn7O12 was synthesized at high pressure and high temperature, and its crystal structure and magnetic properties were investigated. The study revealed structural and magnetic phase transitions at different temperatures, as well as complex frequency-dependent features.
JOURNAL OF SOLID STATE CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Cameliu Himcinschi, Felix Drechsler, David Sebastian Walch, Akash Bhatnagar, Alexei A. Belik, Jens Kortus
Summary: The dielectric function and bandgap of BiFe0.5Cr0.5O3 thin films were measured using spectroscopic ellipsometry and compared with BiFeO3 and BiCrO3. A lower bandgap was observed in BiFe0.5Cr0.5O3 due to an optical transition between Cr and Fe ions. Raman spectroscopy revealed the presence of new phonon modes in the thin films and bulk samples, and temperature-induced structural phase transitions were studied in BiFe0.3Cr0.7O3.
Article
Chemistry, Multidisciplinary
Dmitry V. Karpinsky, Maxim V. Silibin, Siarhei I. Latushka, Dmitry V. Zhaludkevich, Vadim V. Sikolenko, Hanan Al-Ghamdi, Aljawhara H. Almuqrin, M. I. Sayyed, Alexei A. Belik
Summary: The crystal structure and magnetic state of the (1 - x)BiFeO3-(x)BiMnO3 solid solution were analyzed. It was found that increasing the dopant concentration led to structural and magnetic transitions at room temperature, resulting in a two-phase structure. Irreversible temperature-driven structural transitions favored the stabilization of high-temperature structural phases.
Article
Materials Science, Multidisciplinary
H. Y. Huang, A. Singh, C. Wu, J. D. Xie, J. Okamoto, A. A. Belik, E. Kurmaev, A. Fujimori, C. T. Chen, S. Streltsov, D. J. Huang
Summary: The state with effective total moment J(eff) = 1/2 can suppress Jahn-Teller distortions and induce a strong exchange anisotropy, leading to the formation of a spin-liquid state in real materials. However, diagnosing this state remains challenging. In this study, resonant inelastic X-ray scattering is used to probe the J(eff) = 1/2 state in CuAl2O4, and it is found that a Jahn-Teller state competes with the J(eff) = 1/2 state in this compound.
NPJ QUANTUM MATERIALS
(2022)
Article
Chemistry, Inorganic & Nuclear
Alexei A. Belik
Summary: Aurivillius phases are important inorganic compounds with potential ferroelectric properties. Bi4Ti3O12 is a well-known compound in this family, and a full magnetic analogue, Bi4V3O12, has been successfully synthesized with d(1) cations. Bi4V3O12 shows reversible structural transitions in an inert atmosphere, and exhibits anisotropic thermal expansion as well as low-dimensional magnetism with antiferromagnetic interactions.
INORGANIC CHEMISTRY
(2022)
Article
Chemistry, Physical
Yu Yu Dikhtyar, D. A. Spassky, V. A. Morozov, D. Deyneko, A. A. Belik, O. Baryshnikova, I. Nikiforov, B. Lazoryak
Summary: Ca(8)ZnLn(PO4)(7) phosphates with β-Ca-3(PO4)(2)-type structure were prepared by high-temperature solid-state technique, and the influence of Ln(3+) on its structure, luminescent properties and temperature of phase transitions was investigated.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Inorganic & Nuclear
Alexei A. Belik, Dmitry D. Khalyavin, Yoshitaka Matsushita, Kazunari Yamaura
Summary: A new member of A-site columnar-ordered A(2)A'A'' B4O12 quadruple perovskites Y2CuGaMn4O12 prepared by a high-pressure, high-temperature method exhibits long-range ferrimagnetic order and anisotropic thermal expansion. The Cu2+ doping significantly changes the magnetic properties, affecting the ordering.
INORGANIC CHEMISTRY
(2022)
Article
Chemistry, Physical
Alexei A. Belik, Andreas Doenni, Masahiko Tanaka, Iana S. Glazkova, Alexey V. Sobolev, Igor A. Presniakov
Summary: New ferrites with the BaRFeO4 composition (R = Ho, Er, Tm, and Yb) were synthesized using a solid-state method. Their crystal structures, physical properties, and magnetic behavior were studied. The results showed distinct magnetic transitions for different R values and evidence of spin-induced ferroelectric polarization, suggesting complex magnetic structures and exchange interactions.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Multidisciplinary
Dmitry Karpinsky, Maxim Silibin, Siarhei Latushka, Dmitry Zhaludkevich, Vadim V. Sikolenko, Roman Svetogorov, M. Sayyed, Nouf Almousa, Alex Trukhanov, Sergei Trukhanov, Alexei A. Belik
Summary: The compound BiFe0.7Mn0.3O3 consists of coexistent anti-polar orthorhombic and polar rhombohedral phases at room temperature. It has a metastable structural state which can be modified by thermal annealing and an external magnetic field. These modifications lead to changes in the volume fraction of the rhombohedral phase and the magnetic properties of the compound.
Article
Chemistry, Multidisciplinary
Svetlana M. M. Posokhova, Vladimir A. A. Morozov, Dina V. V. Deyneko, Boris S. S. Redkin, Dmitry A. A. Spassky, Vitali Nagirnyi, Alexei A. A. Belik, Joke Hadermann, Erzhena T. T. Pavlova, Bogdan I. I. Lazoryak
Summary: The influence of preparation techniques on the structure and luminescent properties of K5Eu(MoO4)(4) (KEMO) was studied. The different synthesis techniques resulted in variations in the crystal structure of KEMO, with the CZ technique producing a (3 + 1)D incommensurately modulated structure. The crystal grown by the CZ technique also exhibited the highest luminescent intensity and a high quantum yield of 66.5%.
Article
Chemistry, Inorganic & Nuclear
Xun Kang, Alexei A. Belik, Yoshihiro Tsujimoto, Kazunari Yamaura
Summary: Under high-pressure and high-temperature conditions, doped Bi3Re3O11 and Bi3Re3O11 with Fe up to 29 atomic % were synthesized. The crystal structures and chemical compositions of Bi3Os2.45Fe0.55O11 and Bi3Re2.13Fe0.87O11 were determined by synchrotron powder X-ray diffraction and electron probe microanalysis. Both materials showed magnetic and electronic transport properties, indicating their potential for spintronic devices.
INORGANIC CHEMISTRY
(2022)
Article
Chemistry, Physical
Alexei A. Belik, Ran Liu, Kazunari Yamaura
Summary: Sm2MnZnMn4-xTixO12 perovskites with different Mn contents were synthesized, and it was found that Zn doping significantly modified the magnetic properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Dmitry Spassky, Andrey Vasil'ev, Nataliya Krutyak, Oleg Buzanov, Vladimir Morozov, Alexei Belik, Nikita Fedorov, Patrick Martin, Andrei Belsky
Summary: The decay kinetics of Gd3Al2Ga3O12:Ce3+ single crystal luminescence were investigated under dense laser excitation. Both the decay times and the intensity of Ce3+ luminescence were found to be dependent on the excitation density. These observed effects were attributed to the interaction between excitons and the energy transfer from excitons to Ce3+. Numerical simulation of the experimental results was carried out to support the proposed model.
Article
Chemistry, Physical
Alexei A. Belik, Ran Liu, Andreas Donni, Masahiko Tanaka, Kazunari Yamaura
Summary: In this work, perovskite solid solutions (Lu0.5Mn0.5)(Mn1-xTix)O-3 were synthesized and their crystal structure was determined by Rietveld analysis of X-ray powder diffraction data. It was found that the x=0.25 and 0.50 samples exhibit long-range ferrimagnetic order below their respective transition temperatures Tc=89K and 36K, despite the presence of non-magnetic Ti4+ ions diluting the A and B sublattices. The x=0.75 sample shows a spin-glass transition at Ts=6K. Temperature-independent dielectric constants were observed for the x=0.50 and x=0.75 samples.
Article
Chemistry, Physical
Elena V. V. Sipina, Dmitry A. A. Spassky, Nataliya R. R. Krutyak, Vladimir A. A. Morozov, Evgenia S. S. Zhukovskaya, Alexei A. A. Belik, Mikhail S. S. Manylov, Bogdan I. I. Lazoryak, Dina V. V. Deyneko
Summary: beta-Ca-3(PO4)(2)-type phosphors Ca9-xMnxEu(PO4)(7) were synthesized and characterized. The abnormal reduction of Eu3+ to Eu2+ in air was observed and confirmed by PL spectra study and XPS. The redistribution of Eu2+/Eu3+ ions among crystal sites and the abnormal quenching of Eu3+ emission were discussed in detail.
