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
Chemistry, Multidisciplinary
Muratahan Aykol, Joseph H. Montoya, Jens Hummelshoj
Summary: The rational solid-state synthesis of inorganic compounds involves catalytic nucleation on crystalline reactants, where contributions of reaction and interfacial energies to nucleation barriers are approximated from thermo-chemical data and crystal features. Favorable synthesis reactions are identified by Pareto analysis of relative nucleation barriers and phase selectivities, enabling reaction planning for a range of compounds and discussing pathways for retrosynthesis of inorganics.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Chemistry, Physical
Andreas Donni, Vladimir Y. Pomjakushin, Lei Zhang, Kazunari Yamaura, Alexei A. Belik
Summary: High-pressure synthesis was used to prepare (Ho1-xMnx)MnO3 solid solutions with x = 0.2 and 0.3, showing unique magnetic and structural properties with magnetization reversal behavior below the compensation temperature.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Inorganic & Nuclear
Matilde Saura-Muzquiz, Maxim Avdeev, Helen E. A. Brand, Brendan J. Kennedy
Summary: The structures and magnetic properties of Os4+ (5d4) halides are described, and the crystal structures and thermal stability of different compounds are studied. The experimental results show that these compounds exhibit unique magnetic behavior with a weak magnetic ground state.
INORGANIC CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Kunlang Ji, Khalid N. Alharbi, Elena Solana-Madruga, Gessica T. Moyo, Clemens Ritter, J. Paul Attfield
Summary: Controlling cation ordering in perovskites is crucial for their structural, physical, and chemical properties. Under pressure, thermal transformations can achieve fully disordered cations in double perovskites, leading to a switch in magnetic properties. Comparing different polymorphs of materials can help explore the effects of cation order and disorder on properties like ferroelectricity and conductivity.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Physical
Katharina Dorn, Bjoern Blaschkowski, Heiko Bamberger, Joris van Slageren, Marc Widenmeyer, Anke Weidenkaff, Emmanuelle Suard, Ingo Hartenbach
Summary: The derivatives of the Li1-xRE5+xW8O32 series (RE = Dy-Lu) crystallize in the monoclinic system with C-center symmetry. These compounds exhibit a mixed occupation of Li+ and RE3+ cations in their crystal structures, with a deficiency of lithium leading to an excess of positive charges in the formula.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Physics, Multidisciplinary
Qiang Zhang, Satoshi Okamoto, German D. Samolyuk, Matthew B. Stone, Alexander Kolesnikov, Rui Xue, Jiaqiang Yan, Michael A. McGuire, David Mandrus, D. Alan Tennant
Summary: The study of magnetic Weyl semimetal Co3Sn2S2 reveals its highly anisotropic magnetic properties and the presence of Weyl points in different temperature regions. Using density functional theory calculations, it is shown that the important role of the 120-degree antiferromagnetic order in supporting Weyl points in the intermediate temperature region.
PHYSICAL REVIEW LETTERS
(2021)
Article
Chemistry, Multidisciplinary
Seyed Sepehr Mohajerani, Francesco Ricci, Fredrik L. Nordstrom
Summary: The binary T-X phase diagram of salicylic acid and benzoic acid was experimentally determined, showing two crystalline solid solutions with solid-state miscibility limits of 10.9 mol% and 82.5 mol% benzoic acid in salicylic acid at 25 degrees Celsius. The eutectic composition of 60.0 mol% benzoic acid in salicylic acid at a eutectic temperature of 112.69 degrees Celsius was also determined. Non-linearity in the Tammann plot was observed due to the temperature dependence of the solvus and compositional non-uniformity in the material.
Article
Chemistry, Multidisciplinary
Christopher J. H. Smalley, Andrew J. Logsdail, Colan E. Hughes, Dinu Iuga, Mark T. Young, Kenneth D. M. Harris
Summary: We report the solid-state structural properties and tautomeric interconversion of alloxazine, a tricyclic ring system found in biologically important molecules. The crystal structures containing both alloxazine and isoalloxazine tautomers were characterized by powder X-ray diffraction (XRD) and high-resolution solid-state N-15 NMR. Computational calculations were also performed to determine the relative energies and mechanisms of tautomeric interconversion. The results show that the alloxazine tautomer is favored in the crystal structure, with over 99.9% of the molecules existing in this form at ambient temperature.
CRYSTAL GROWTH & DESIGN
(2022)
Article
Materials Science, Multidisciplinary
Jun Sugiyama, Wataru Higemoto, Daniel Andreica, Ola Kenji Forslund, Elisabetta Nocerino, Martin Mansson, Yasmine Sassa, Ritu Gupta, Rustem Khasanov, Hiroto Ohta, Hiroyuki Nakamura
Summary: The magnetic properties of quasi-one-dimensional compound BaVSe3 were investigated using positive muon spin rotation and relaxation measurements under ambient and high pressures. It was found that the V moments in BaVSe3 align ferromagnetically along the c axis but slightly canted toward the a axis. The muon spin precession frequencies at two magnetically different muon sites could not be adequately explained with simple ferromagnetic structures, and Tc was observed to decrease slightly before increasing rapidly with pressure. The study also revealed two magnetic interactions in the ab plane at different pressures, with one being antiferromagnetic and the other ferromagnetic.
Article
Geochemistry & Geophysics
Bryan C. Chakoumakos, John B. Parise
Summary: The development of sophisticated sample environments to control temperature, pressure, and magnetic field has advanced in parallel with neutron source and instrumentation development, expanding the accessible pressure-temperature space for neutron scattering experiments. Recent advancements have enabled researchers to explore new territories, including hydrogenous minerals and magnetic structural phase diagrams, utilizing new capabilities and a deeper understanding of structural and magnetic transitions.
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
Materials Science, Multidisciplinary
Constanze Roesche, Tiziana Boffa-Ballaran, Boriana Mihailova
Summary: This study investigated the effect of Ba doping on the structural transformations and properties of perovskite-type composite materials at the morphotropic phase boundary. The results showed that Ba doping reduces the pressure range of structural transformations and slows down the suppression of off-centering for both A- and B-site cations, indicating that Ba doping affects the elasticity and stability of the material.
Article
Materials Science, Multidisciplinary
N. M. Belozerova, S. E. Kichanov, Z. Jirak, D. P. Kozlenko, O. Kaman, E. Lukin, B. N. Savenko
Summary: The crystal and magnetic structure of the nanostructured manganite La0.53Sr0.47MnO3 were studied using neutron diffraction method. It was found that with increasing pressure, there is a transition from the ferromagnetic phase to an A-type antiferromagnetic phase, leading to a pressure-induced magnetic phase separation in nanostructured manganites.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Article
Crystallography
Paulo H. B. Brant Carvalho, Amber Mace, Inna Martha Nangoi, Alexandre A. Leitao, Chris A. Tulk, Jamie J. Molaison, Ove Andersson, Alexander P. Lyubartsev, Ulrich Haeussermann
Summary: The high pressure structural behavior of H-2 and Ne clathrate hydrates was investigated, and the transitions of H-2 and Ne hydrates under different pressure and temperature conditions were observed.
Article
Chemistry, Inorganic & Nuclear
Zachary T. Messegee, Jun Sang Cho, Andrew J. Craig, V. Ovidiu Garlea, Yan Xin, Chang-Jong Kang, Thomas E. Proffen, Hari Bhandari, Jordan C. Kelly, Nirmal J. Ghimire, Jennifer A. . Aitken, Joon I. Jang, Xiaoyan Tan
Summary: In this study, Cu2TSiS4 (T = Mn and Fe) polycrystalline and single-crystal materials were prepared using high-temperature solid-state and chemical vapor transport methods. The polar crystal structure was confirmed by various techniques, including neutron powder diffraction, X-ray single-crystal refinement, electron diffraction, energy-dispersive X-ray spectroscopy, and second harmonic generation (SHG). Magnetic measurements showed antiferromagnetic ordering at 8 K and 14 K for the two compounds, supported by temperature-dependent neutron powder diffraction data. Additional magnetic reflections were observed at 2 K and can be described by specific magnetic propagation vectors for each compound. The refined antiferromagnetic structure revealed the tilting of Mn/Fe spins away from the ac plane and the calculated total magnetic moments. Both compounds exhibited modest second-order nonlinear susceptibilities.
INORGANIC CHEMISTRY
(2023)
Article
Physics, Applied
Benjamin A. Frandsen, Raju Baral, Barry Winn, V. Ovidiu Garlea
Summary: This study reports the first example of obtaining magnetic pair distribution function (mPDF) data through neutron polarization analysis, showcasing high-quality mPDF data collected on an antiferromagnetic semiconductor. By applying ad hoc corrections to the data, significant improvement in data quality was demonstrated, providing insights into the potential for routine collection of high-quality mPDF data.
JOURNAL OF APPLIED PHYSICS
(2022)
Article
Physics, Multidisciplinary
Xintong Li, Yuchen Gu, Yue Chen, V. Ovidiu Garlea, Kazuki Iida, Kazuya Kamazawa, Yangmu Li, Guochu Deng, Qian Xiao, Xiquan Zheng, Zirong Ye, Yingying Peng, I. A. Zaliznyak, J. M. Tranquada, Yuan Li
Summary: We present magnetometry data on twin-free single crystals of Na3Co2SbO6, a candidate material for realizing the Kitaev honeycomb model for quantum spin liquids. Contrary to the belief that such materials can be modeled with the symmetries of an ideal honeycomb lattice, our data show a pronounced twofold symmetry and in-plane anisotropy of over 200%, despite the small orthorhombic distortion of the honeycomb layer. Magnetic neutron diffraction is used to study the field-induced phases observed in the magnetometry, which manifest as diffuse scattering signals in the paramagnetic state and are consistent with a theory predicting a nearby quantum spin liquid phase. These findings call for a theoretical understanding of the observed in-plane anisotropy and make Na3Co2SbO6 a promising candidate for studying exotic quantum phases through targeted external tuning.
Article
Materials Science, Multidisciplinary
S. Calder, L. D. Sanjeewa, V. O. Garlea, J. Xing, R. J. Terry, J. W. Kolis
Summary: Coordination polymers, or magnetic metal-organic frameworks (MOFs), with both organic and inorganic building blocks provide a platform for designing tailored structural motifs. We studied a series of compounds with transition metal ions Cu2+, Co2+, and Mn2+, which form isolated one-dimensional spin chains. Experimental measurements give insights into the magnetic interactions and structure in these materials.
PHYSICAL REVIEW MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Seung-Hwan Do, Hao Zhang, David A. Dahlbom, Travis J. Williams, V. Ovidiu Garlea, Tao Hong, Tae-Hwan Jang, Sang-Wook Cheong, Jae-Hoon Park, Kipton Barros, Cristian D. Batista, Andrew D. Christianson
Summary: This study tests the hypothesis that N-level systems with strong single-ion anisotropy can be described by a classical approximation based on SU(N) coherent states. The finite temperature inelastic neutron scattering data of the spin-one antiferromagnet Ba2FeSi2O7 is modeled using a generalized Landau-Lifshitz dynamics for SU(3) spins. Unlike the traditional classical limit based on SU(2) coherent states, the results obtained with classical SU(3) spins show good agreement with the measured temperature dependent spectrum. The developed SU(3) approach provides a general framework to understand a broad class of materials with weakly coupled antiferromagnetic dimers, trimers, or tetramers, and magnets with strong single-ion anisotropy.
NPJ QUANTUM MATERIALS
(2023)
Article
Physics, Multidisciplinary
Daniel Flavian, Pavel A. Volkov, S. Hayashida, K. Yu. Povarov, S. Gvasaliya, Premala Chandra, A. Zheludev
Summary: We report the observation of dielectric relaxation caused by quantum critical magnons. Complex capacitance measurements show a dissipative feature that depends on temperature due to low-energy lattice excitations, and the relaxation time follows an activation behavior. The activation energy softens near a field-tuned magnetic quantum critical point at H 1/4 Hc and follows the energy of a single magnon for H > Hc, indicating its magnetic origin. Our study demonstrates the electrical activity of coupled low-energy spin and lattice excitations, which is an example of quantum multiferroic behavior.
PHYSICAL REVIEW LETTERS
(2023)
Article
Multidisciplinary Sciences
Xiaojian Bai, Shang-Shun Zhang, Hao Zhang, Zhiling Dun, W. Adam Phelan, V. Ovidiu Garlea, Martin Mourigal, Cristian D. Batista
Summary: The search for new elementary particles is a fundamental pursuit in physics, and magnons are the elementary quasiparticles describing excitations in magnetic systems. In this study, researchers demonstrate strong quantum interactions between different flavors of elementary quasiparticles in the magnet FeI2. Using neutron scattering, they observe spontaneous decay and recombination of conventional and heavy magnons, indicating the formation of a super-heavy bound-state. This work sheds light on the unusual physics in FeI2, which is attributed to the quasi-flat nature of excitation bands and the presence of Kitaev anisotropic magnetic exchange interactions.
NATURE COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Christopher M. Pasco, Binod K. Rai, Matthias Frontzek, Gabriele Sala, Matthew B. Stone, Bryan C. Chakoumakos, V. Ovidiu Garlea, Andrew D. Christianson, Andrew F. May
Summary: Single crystals of BaNd2PtO5 were grown and characterized to investigate its physical properties and magnetic ground state as a candidate for the Shastry-Sutherland model. It was found to have an antiferromagnetic transition at TN = 1.9 K and a large magnetic anisotropy. The magnetic ground state was determined to be a fully compensated antiferromagnet with a propagation vector of (1/2 1/2 1/2).
PHYSICAL REVIEW MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
D. Flavian, J. Nagl, S. Hayashida, M. Yan, O. Zaharko, T. Fennell, D. Khalyavin, Z. Yan, S. Gvasaliya, A. Zheludev
Summary: The rare-earth-based magnet Nd3BWO9 is a promising candidate for proximate spin-liquid physics. Comprehensive investigations on single crystals of this material using bulk and microscopic techniques were conducted. Magnetization data shows fractional magnetization plateaus for three different field directions. The magnetic phase diagram reveals multiple domes of magnetic order below 0.3 K. The existence of a commensuration transition of the propagation vector at zero magnetic field is also observed.
Article
Materials Science, Multidisciplinary
Tianchen Hu, Hanqi Pi, Shuxiang Xu, Li Yue, Qiong Wu, Qiaomei Liu, Sijie Zhang, Rongsheng Li, Xinyu Zhou, Jiayu Yuan, Dong Wu, Tao Dong, Hongming Weng, Nanlin Wang
Summary: We have discovered that ScV6Sn6, a new intermetallic material with kagome lattice, undergoes a first-order structural phase transition at around 92K, forming a 3 x 3 x 3 charge density wave. Optical spectroscopy and band structure calculations revealed abrupt changes in optical reflectivity/conductivity spectra and band structure after the transition. This provides important insights into the origin of the structural phase transition in this unique kagome lattice intermetallic material.
Article
Materials Science, Multidisciplinary
Xiao Hu, A. Sapkota, V. O. Garlea, G. D. Gu, I. A. Zaliznyak, J. M. Tranquada
Summary: The dominant magnetic interaction in La2CuO4 is superexchange between nearest-neighbor Cu moments, but the pinning of the spin direction depends on weak anisotropic effects associated with spin-orbit coupling. The symmetry of the octahedral tilt pattern allows for out-of-plane canting of the Cu spins, which can be compensated by opposite canting in nearest-neighbor layers. Applying a strong magnetic field perpendicular to the planes can induce a weak ferromagnetic phase by altering the spin canting pattern.
Article
Physics, Multidisciplinary
K. M. Taddei, V. O. Garlea, A. M. Samarakoon, L. D. Sanjeewa, J. Xing, T. W. Heitmann, C. dela Cruz, A. S. Sefat, D. Parker
Summary: Researchers have identified a potential candidate material, KNiAsO4, that may exhibit a spin-liquid ground state based on the Kitaev spin Hamiltonian. Experimental measurements show evidence of magnetic order and a gapped spin-wave spectrum, suggesting the presence of a well-defined spin-liquid state.
PHYSICAL REVIEW RESEARCH
(2023)
Article
Chemistry, Multidisciplinary
Liurukara D. Sanjeewa, V. Ovidiu Garlea, Randy S. Fishman, Mahsa Foroughian, Li Yin, Jie Xing, David S. Parker, Tiffany Smith M. Pellizzeri, Athena S. Sefat, Joseph W. Kolis
Summary: In this study, the magnetic phase diagram of the compound CsCo2(MoO4)2(OH) was determined through magnetic and neutron scattering measurements. The magnetic properties of CsCo2(MoO4)2(OH) are strongly influenced by the crystal lattice and can be easily controlled by magnetic fields. The compound exhibits unique magnetic exchange interactions between two types of Co2+ ions. The magnetic structure is antiferromagnetic along the b-axis at TN = 5 K, with two successive metamagnetic transitions observed. The compound shows promising potential for studying new physics related to sawtooth chain magnetism. Rating: 6/10.
MATERIALS CHEMISTRY FRONTIERS
(2023)
Article
Materials Science, Multidisciplinary
F. Landolt, K. Povarov, Z. Yan, S. Gvasaliya, E. Ressouche, S. Raymond, V. O. Garlea, A. Zheludev
Summary: In this study, single-crystal elastic and inelastic neutron-scattering experiments were conducted on the frustrated ferroantiferromagnet SrZnVO(PO4)2 under high magnetic fields. The results showed significant deviations from classical spin-wave theory, including renormalization of spin-wave bandwidths, redistributions of intensities between different branches, and nonlinearities in the magnetization curve. The previously observed presaturation transition was attributed to a staggered pattern of Dzyaloshinskii-Moriya interactions.
Correction
Materials Science, Multidisciplinary
F. Landolt, Z. Yan, S. Gvasaliya, A. Zheludev, K. Beauvois, E. Ressouche, J. Xu
