1
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Cardoso-Gil R, Krnel M, Wagner FR, Grin Y. On Chemical Bonding in ht-Ga 3Rh and Its Effect on Structural Organization and Thermoelectric Behavior. Inorg Chem 2024; 63:12156-12166. [PMID: 38875220 PMCID: PMC11220751 DOI: 10.1021/acs.inorgchem.4c01280] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2024] [Revised: 05/30/2024] [Accepted: 05/31/2024] [Indexed: 06/16/2024]
Abstract
In the course of systematic studies of intermetallic compounds Ga3TM (TM─transition metal), the compound Ga3Rh is synthesized by direct reaction of the elements at 700 °C. The material obtained is characterized as a high-temperature modification of Ga3Rh. Powder and single-crystal X-ray diffraction analyses reveal tetragonal symmetry (space group P42/mnm, No. 146) with a = 6.4808(2) Å and c = 6.5267(2) Å. Large values and strong anisotropy of the atomic displacement parameters of Ga atoms indicate essential disorder in the crystal structure. A split-position technique is applied to describe the real crystal structure of ht-Ga3Rh. Bonding analysis in ht-Ga3Rh performed on ordered models with the space groups P1̅, P42nm, and P42212 shows, besides the omnipresent heteroatomic Ga-Rh bonds in the rhombic prisms ∞3[Ga8/2Rh2], the formation of homoatomic Ga-Ga bonds bridging the Rh-Rh contacts and the absence of significant Rh-Rh bonding. These features are essential reasons for the experimentally observed disorder in the lattice. In agreement with the calculated electronic density of states, ht-Ga3Rh shows temperature-dependent electrical resistivity of a "bad metal". The very low lattice thermal conductivity of less than 0.5 W m-1 K-1 at 300 K, being lower than those for most other Ga3TM compounds, correlates with the enhanced bonding complexity.
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Affiliation(s)
- Raúl Cardoso-Gil
- Max-Planck-Institut für
Chemische Physik fester Stoffe, Nöthnitzer Str. 40, 01187 Dresden, Germany
| | - Mitja Krnel
- Max-Planck-Institut für
Chemische Physik fester Stoffe, Nöthnitzer Str. 40, 01187 Dresden, Germany
| | - Frank R. Wagner
- Max-Planck-Institut für
Chemische Physik fester Stoffe, Nöthnitzer Str. 40, 01187 Dresden, Germany
| | - Yuri Grin
- Max-Planck-Institut für
Chemische Physik fester Stoffe, Nöthnitzer Str. 40, 01187 Dresden, Germany
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2
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Parashchuk T, Cherniushok O, Smitiukh O, Marchuk O, Wojciechowski KT. Structure Evolution and Bonding Inhomogeneity toward High Thermoelectric Performance in Cu 2CoSnS 4-xSe x Materials. CHEMISTRY OF MATERIALS : A PUBLICATION OF THE AMERICAN CHEMICAL SOCIETY 2023; 35:4772-4785. [PMID: 37396683 PMCID: PMC10311630 DOI: 10.1021/acs.chemmater.3c00586] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Revised: 05/22/2023] [Indexed: 07/04/2023]
Abstract
Lightweight diamond-like structure (DLS) materials are excellent candidates for thermoelectric (TE) applications due to their low costs, eco-friendly nature, and property stability. The main obstacles restricting the energy-conversion performance by the lightweight DLS materials are high lattice thermal conductivity and relatively low carrier mobility. By investigating the anion substitution effect on the structural, microstructural, electronic, and thermal properties of Cu2CoSnS4-xSex, we show that the simultaneous enhancement of the crystal symmetry and bonding inhomogeneity engineering are effective approaches to enhance the TE performance in lightweight DLS materials. Particularly, the increase of x in Cu2CoSnS4-xSex makes the DLS structure with the ideal tetrahedral bond angles of 109.5° favorable, leading to better crystal symmetry and higher carrier mobility in samples with higher selenium content. In turn, the phonon transport in the investigated DLS materials is strongly disturbed due to the bonding inhomogeneity between anions and three sorts of cations inducing large lattice anharmonicity. The increase of Se content in Cu2CoSnS4-xSex only intensified this effect resulting in a lower lattice component of the thermal conductivity (κL) for Se-rich samples. As a result of the enhanced power factor S2ρ-1 and the low κL, the dimensionless thermoelectric figure of merit ZT achieves a high value of 0.75 for Cu2CoSnSe4 DLS material. This work demonstrates that crystal symmetry and bonding inhomogeneity play an important role in the transport properties of DLS materials and provide a path for the development of new perspective materials for TE energy conversion.
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Affiliation(s)
- Taras Parashchuk
- Thermoelectric
Research Laboratory, Department of Inorganic Chemistry, Faculty of
Materials Science and Ceramics, AGH University
of Science and Technology, Mickiewicza Ave. 30, 30-059 Krakow, Poland
| | - Oleksandr Cherniushok
- Thermoelectric
Research Laboratory, Department of Inorganic Chemistry, Faculty of
Materials Science and Ceramics, AGH University
of Science and Technology, Mickiewicza Ave. 30, 30-059 Krakow, Poland
| | - Oleksandr Smitiukh
- Department
of Chemistry and Technology, Volyn National
University, Voli Ave 13, Lutsk 43025, Ukraine
| | - Oleg Marchuk
- Department
of Chemistry and Technology, Volyn National
University, Voli Ave 13, Lutsk 43025, Ukraine
| | - Krzysztof T. Wojciechowski
- Thermoelectric
Research Laboratory, Department of Inorganic Chemistry, Faculty of
Materials Science and Ceramics, AGH University
of Science and Technology, Mickiewicza Ave. 30, 30-059 Krakow, Poland
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3
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Zhang W, Berthebaud D, Halet JF, Mori T. Electronic Configurations of 3d Transition-Metal Compounds Using Local Structure and Neural Networks. J Phys Chem A 2022; 126:7373-7381. [PMID: 36178210 DOI: 10.1021/acs.jpca.2c03901] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Machine learning (ML) methods extract statistical relationships between inputs and results. When the inputs are solid-state crystal structures, structure-property relationships can be obtained. In this work, we investigate whether a simple neural network is able to learn the 3d orbital occupations for the transition-metal (TM) centers in crystalline inorganic solid-state compounds using only the local structure around the transition-metal centers described by rotationally invariant fingerprints based on spherical harmonics and one-hot elemental encoding. A multilayer neural network trained on density functional theory (DFT) results of about 1800 samples was developed and showed good performance in predicting the TM orbital occupations (for both spin channels). We study in detail how the local structure affects the predictions of the local properties and how they provide physical insights for the design of a future machine learning model for materials chemistry. The proposed ML method is illustrated in practical application by predicting local magnetic moments of the transition-metal atoms in a full set of inorganic structures with large unit cells. Although less accurate compared to the experimental data, the ML results compared well with the DFT results, suggesting the feasibility of electronic property prediction based only on structure input.
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Affiliation(s)
- Wenhao Zhang
- WPI-MANA, National Institute for Materials Science (NIMS), Namiki 1-1, Tsukuba305-0044, Japan.,Graduate School of Pure and Applied Sciences, University of Tsukuba, Tennodai 1-1-1, Tsukuba305-8671, Japan
| | - David Berthebaud
- CNRS-Saint-Gobain-NIMS, IRL 3629, Laboratory for Innovative Key Materials and Structures (LINK), National Institute for Materials Science (NIMS), Namiki 1-1, Tsukuba305-0044, Japan
| | - Jean-François Halet
- CNRS-Saint-Gobain-NIMS, IRL 3629, Laboratory for Innovative Key Materials and Structures (LINK), National Institute for Materials Science (NIMS), Namiki 1-1, Tsukuba305-0044, Japan
| | - Takao Mori
- WPI-MANA, National Institute for Materials Science (NIMS), Namiki 1-1, Tsukuba305-0044, Japan.,Graduate School of Pure and Applied Sciences, University of Tsukuba, Tennodai 1-1-1, Tsukuba305-8671, Japan
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4
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Cherniushok O, Cardoso-Gil R, Parashchuk T, Knura R, Grin Y, Wojciechowski KT. Lone-Pair-Like Interaction and Bonding Inhomogeneity Induce Ultralow Lattice Thermal Conductivity in Filled β-Manganese-Type Phases. CHEMISTRY OF MATERIALS : A PUBLICATION OF THE AMERICAN CHEMICAL SOCIETY 2022; 34:6389-6401. [PMID: 35937497 PMCID: PMC9344398 DOI: 10.1021/acs.chemmater.2c00915] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Finding a way to interlink heat transport with the crystal structure and order/disorder phenomena is crucial for designing materials with ultralow lattice thermal conductivity. Here, we revisit the crystal structure and explore the thermoelectric properties of several compounds from the family of the filled β-Mn-type phases M 2/n n+Ga6Te10 (M = Pb, Sn, Ca, Na, Na + Ag). The strongly disturbed thermal transport observed in the investigated materials originates from a three-dimensional Te-Ga network with lone-pair-like interactions, which results in large variations of the Ga-Te and M-Te interatomic distances and substantial anharmonic effects. In the particular case of NaAgGa6Te10, the additional presence of different cations leads to bonding inhomogeneity and strong structural disorder, resulting in a dramatically low lattice thermal conductivity (∼0.25 Wm-1 K-1 at 298 K), being the lowest among the reported β-Mn-type phases. This study offers a way to develop materials with ultralow lattice thermal conductivity by considering bonding inhomogeneity and lone-pair-like interactions.
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Affiliation(s)
- Oleksandr Cherniushok
- Thermoelectric
Research Laboratory, Department of Inorganic Chemistry, Faculty of
Materials Science and Ceramics, AGH University
of Science and Technology, Mickiewicza Ave. 30, 30-059 Krakow, Poland
| | - Raul Cardoso-Gil
- Max-Planck-Institut
für Chemische Physik fester Stoffe, Nöthnitzer Str. 40, 01187 Dresden, Germany
| | - Taras Parashchuk
- Thermoelectric
Research Laboratory, Department of Inorganic Chemistry, Faculty of
Materials Science and Ceramics, AGH University
of Science and Technology, Mickiewicza Ave. 30, 30-059 Krakow, Poland
| | - Rafal Knura
- Thermoelectric
Research Laboratory, Department of Inorganic Chemistry, Faculty of
Materials Science and Ceramics, AGH University
of Science and Technology, Mickiewicza Ave. 30, 30-059 Krakow, Poland
- Department
of Science, Graduate School of Science and Technology, Kumamoto University, 2 Chome-39-1 Kurokami, Chuo Ward, 860-8555 Kumamoto, Japan
| | - Yuri Grin
- Max-Planck-Institut
für Chemische Physik fester Stoffe, Nöthnitzer Str. 40, 01187 Dresden, Germany
| | - Krzysztof T. Wojciechowski
- Thermoelectric
Research Laboratory, Department of Inorganic Chemistry, Faculty of
Materials Science and Ceramics, AGH University
of Science and Technology, Mickiewicza Ave. 30, 30-059 Krakow, Poland
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5
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Parashchuk T, Knura R, Cherniushok O, Wojciechowski KT. Ultralow Lattice Thermal Conductivity and Improved Thermoelectric Performance in Cl-Doped Bi 2Te 3-xSe x Alloys. ACS APPLIED MATERIALS & INTERFACES 2022; 14:33567-33579. [PMID: 35830414 PMCID: PMC9335406 DOI: 10.1021/acsami.2c08686] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/16/2022] [Accepted: 07/01/2022] [Indexed: 06/15/2023]
Abstract
Bi2Te3-based alloys are the main materials for the construction of low- and medium-temperature thermoelectric modules. In this work, the microstructure and thermoelectric properties of Cl-doped Bi2Te3-xSex alloys were systematically investigated considering the high anisotropy inherent in these materials. The prepared samples have a highly oriented microstructure morphology, which results in very different thermal transport properties in two pressing directions. To accurately separate the lattice, electronic, and bipolar components of the thermal conductivity over the entire temperature range, we employed a two-band Kane model to the Cl-doped Bi2Te3-xSex alloys. It was established that Cl atoms act as electron donors, which tune the carrier concentration and effectively suppress the minority carrier transport in Bi2Te3-xSex alloys. The estimated value of the lattice thermal conductivity was found to be as low as 0.15 Wm-1 K-1 for Bi2Te3-x-ySexCly with x = 0.6 and y = 0.015 at 673 K in parallel to the pressing direction, which is among the lowest values reported for crystalline materials. The large reduction of the lattice thermal conductivity in both pressing directions for the investigated Bi2Te3-xSex alloys is connected with the different polarities of the Bi-(Te/Se)1 and Bi-(Te/Se)2 bonds, while the lone-pair (Te/Se) interactions are mainly responsible for the extremely low lattice thermal conductivity in the parallel direction. As a result of the enhanced power factor, suppressed bipolar conduction, and ultralow lattice thermal conductivity, a maximum ZT of 1.0 at 473 K has been received in the Bi2Te2.385Se0.6Cl0.015 sample.
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Affiliation(s)
- Taras Parashchuk
- Thermoelectric
Research Laboratory, Department of Inorganic Chemistry, Faculty of
Materials Science and Ceramics, AGH University
of Science and Technology, Mickiewicza Ave. 30, Krakow 30-059, Poland
| | - Rafal Knura
- Thermoelectric
Research Laboratory, Department of Inorganic Chemistry, Faculty of
Materials Science and Ceramics, AGH University
of Science and Technology, Mickiewicza Ave. 30, Krakow 30-059, Poland
- Department
of Science, Graduate School of Science and Technology, Kumamoto University, 2 Chome-39-1 Kurokami, Chuo Ward, Kumamoto 860-8555, Japan
| | - Oleksandr Cherniushok
- Thermoelectric
Research Laboratory, Department of Inorganic Chemistry, Faculty of
Materials Science and Ceramics, AGH University
of Science and Technology, Mickiewicza Ave. 30, Krakow 30-059, Poland
| | - Krzysztof T. Wojciechowski
- Thermoelectric
Research Laboratory, Department of Inorganic Chemistry, Faculty of
Materials Science and Ceramics, AGH University
of Science and Technology, Mickiewicza Ave. 30, Krakow 30-059, Poland
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6
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Dong Z, Luo J, Wang C, Jiang Y, Tan S, Zhang Y, Grin Y, Yu Z, Guo K, Zhang J, Zhang W. Half-Heusler-like compounds with wide continuous compositions and tunable p- to n-type semiconducting thermoelectrics. Nat Commun 2022; 13:35. [PMID: 35013264 PMCID: PMC8748599 DOI: 10.1038/s41467-021-27795-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2021] [Accepted: 12/03/2021] [Indexed: 11/16/2022] Open
Abstract
Half-Heusler and full-Heusler compounds were considered as independent phases with a natural composition gap. Here we report the discovery of TiRu1+xSb (x = 0.15 ~ 1.0) solid solution with wide homogeneity range and tunable p- to n-type semiconducting thermoelectrics, which bridges the composition gap between half- and full-Heusler phases. At the high-Ru end, strange glass-like thermal transport behavior with unusually low lattice thermal conductivity (~1.65 Wm−1K−1 at 340 K) is observed for TiRu1.8Sb, being the lowest among reported half-Heusler phases. In the composition range of 0.15 < x < 0.50, TiRu1+xSb shows abnormal semiconducting behaviors because tunning Ru composition results in band structure change and carrier-type variation simultaneously, which seemingly correlates with the localized d electrons. This work reveals the possibility of designing fascinating half-Heusler-like materials by manipulating the tetrahedral site occupancy, and also demonstrates the potential of tuning crystal and electronic structures simultaneously to realize intriguing physical properties. Half-and full-Heusler compounds are considered as independent phases with a natural composition gap. Here the authors report the discovery of half-Heusler-like TiRu1+xSb with wide continuous compositions falling in the gap region and tunable p-to n-type semiconducting thermoelectrics.
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Affiliation(s)
- Zirui Dong
- School of Materials Science and Engineering, Shanghai University, Shanghai, 200444, China
| | - Jun Luo
- School of Materials Science and Engineering, Shanghai University, Shanghai, 200444, China. .,Materials Genome Institute, Shanghai University, Shanghai, 200444, China.
| | - Chenyang Wang
- School of Materials Science and Engineering, Shanghai University, Shanghai, 200444, China
| | - Ying Jiang
- Materials Genome Institute, Shanghai University, Shanghai, 200444, China
| | - Shihua Tan
- Department of Physics and Shenzhen Institute for Quantum Science and Engineering, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Yubo Zhang
- Department of Physics and Shenzhen Institute for Quantum Science and Engineering, Southern University of Science and Technology, Shenzhen, 518055, China.,Guangdong Provincial Key Lab for Computational Science and Materials Design, and Shenzhen Municipal Key-Lab for Advanced Quantum Materials and Devices, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Yuri Grin
- Max-Planck-Institut für Chemische Physik fester Stoffe, Nöthnitzer Straße 40, 01187, Dresden, Germany
| | - Zhiyang Yu
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, 350002, China
| | - Kai Guo
- School of Materials Science and Engineering, Shanghai University, Shanghai, 200444, China
| | - Jiye Zhang
- School of Materials Science and Engineering, Shanghai University, Shanghai, 200444, China
| | - Wenqing Zhang
- Department of Physics and Shenzhen Institute for Quantum Science and Engineering, Southern University of Science and Technology, Shenzhen, 518055, China. .,Guangdong Provincial Key Lab for Computational Science and Materials Design, and Shenzhen Municipal Key-Lab for Advanced Quantum Materials and Devices, Southern University of Science and Technology, Shenzhen, 518055, China.
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7
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Cardoso-Gil R, Zelenina I, Stahl QE, Bobnar M, Koželj P, Krnel M, Burkhardt U, Veremchuk I, Simon P, Carrillo-Cabrera W, Boström M, Grin Y. The Intermetallic Semiconductor ht-IrGa 3: a Material in the in-Transformation State. ACS MATERIALS AU 2021; 2:45-54. [PMID: 36855699 PMCID: PMC9928196 DOI: 10.1021/acsmaterialsau.1c00025] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The compound IrGa3 was synthesized by direct reaction of the elements. It is formed as a high-temperature phase in the Ir-Ga system. Single-crystal X-ray diffraction analysis confirms the tetragonal symmetry (space group P42 /mnm, No. 136) with a = 6.4623(1) Å and c = 6.5688(2) Å and reveals strong disorder in the crystal structure, reflected in the huge values and anisotropy of the atomic displacement parameters. A model for the real crystal structure of ht-IrGa3 is derived by the split-position approach from the single-crystal X-ray diffraction data and confirmed by an atomic-resolution transmission electron microscopy study. Temperature-dependent electrical resistivity measurements evidence semiconductor behavior with a band gap of 30 meV. A thermoelectric characterization was performed for ht-IrGa3 and for the solid solution IrGa3-x Zn x .
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Affiliation(s)
- Raúl Cardoso-Gil
- Max-Planck-Institut
für Chemische Physik fester Stoffe, Nöthnitzer Straße 40, 01187 Dresden, Germany,E-mail for R.C-G.:
| | - Iryna Zelenina
- Max-Planck-Institut
für Chemische Physik fester Stoffe, Nöthnitzer Straße 40, 01187 Dresden, Germany
| | - Quirin E. Stahl
- Institut
für Festkörper- und Materialphysik, TU Dresden, 01062 Dresden, Germany
| | - Matej Bobnar
- Max-Planck-Institut
für Chemische Physik fester Stoffe, Nöthnitzer Straße 40, 01187 Dresden, Germany
| | - Primož Koželj
- Max-Planck-Institut
für Chemische Physik fester Stoffe, Nöthnitzer Straße 40, 01187 Dresden, Germany
| | - Mitja Krnel
- Max-Planck-Institut
für Chemische Physik fester Stoffe, Nöthnitzer Straße 40, 01187 Dresden, Germany
| | - Ulrich Burkhardt
- Max-Planck-Institut
für Chemische Physik fester Stoffe, Nöthnitzer Straße 40, 01187 Dresden, Germany
| | - Igor Veremchuk
- Max-Planck-Institut
für Chemische Physik fester Stoffe, Nöthnitzer Straße 40, 01187 Dresden, Germany
| | - Paul Simon
- Max-Planck-Institut
für Chemische Physik fester Stoffe, Nöthnitzer Straße 40, 01187 Dresden, Germany
| | - Wilder Carrillo-Cabrera
- Max-Planck-Institut
für Chemische Physik fester Stoffe, Nöthnitzer Straße 40, 01187 Dresden, Germany
| | - Magnus Boström
- Max-Planck-Institut
für Chemische Physik fester Stoffe, Nöthnitzer Straße 40, 01187 Dresden, Germany
| | - Yuri Grin
- Max-Planck-Institut
für Chemische Physik fester Stoffe, Nöthnitzer Straße 40, 01187 Dresden, Germany,E-mail for Yu.G.:
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8
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Cicirello G, Swindle A, Wang J. Synthesis, crystal structure, and thermoelectric properties of ternary phosphide BaCu5P3. J SOLID STATE CHEM 2021. [DOI: 10.1016/j.jssc.2021.122017] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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9
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Abstract
Subtle changes in chemical bonds may result in dramatic revolutions in magnetic properties in solid-state materials. MnPt5P, a derivative of the rare-earth-free ferromagnetic MnPt5As, was discovered and is presented in this work. MnPt5P was synthesized, and its crystal structure and chemical composition were characterized by X-ray diffraction as well as energy-dispersive X-ray spectroscopy. Accordingly, MnPt5P crystallizes in the layered tetragonal structure with the space group P4/mmm (No. 123), in which the face-shared Mn@Pt12 polyhedral layers are separated by P layers. In contrast to the ferromagnetism observed in MnPt5As, the magnetic properties measurements on MnPt5P show antiferromagnetic ordering occurs at ∼188 K with a strong magnetic anisotropy in and out of the ab-plane. Moreover, a spin-flop transition appears when a high magnetic field is applied. An A-type antiferromagnetic structure was obtained from the analysis of powder neutron diffraction (PND) patterns collected at 150 and 9 K. Calculated electronic structures imply that hybridization of Mn-3d and Pt-5d orbitals is critical for both the structural stability and observed magnetic properties. Semiempirical molecular orbitals calculations on both MnPt5P and MnPt5As indicate that the lack of 4p character on the P atoms at the highest occupied molecular orbital (HOMO) in MnPt5P may cause the different magnetic behavior in MnPt5P compared to MnPt5As. The discovery of MnPt5P, along with our previously reported MnPt5As, parametrizes the end points of a tunable system to study the chemical bonding which tunes the magnetic ordering from ferromagnetism to antiferromagnetism with the strong spin-orbit coupling (SOC) effect.
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Affiliation(s)
- Xin Gui
- Department of Chemistry, Princeton University, Princeton, New Jersey 08540, United States
| | - Ryan A Klein
- Chemistry and Nanoscience Department, National Renewable Energy Laboratory, Golden, Colorado 80401, United States
- NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, United States
| | - Craig M Brown
- NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, United States
| | - Weiwei Xie
- Department of Chemistry and Chemical Biology, Rutgers University, Rutgers, New Jersey 08854, United States
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10
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Ovchinnikov A, Smetana V, Mudring AV. Metallic alloys at the edge of complexity: structural aspects, chemical bonding and physical properties. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2020; 32:243002. [PMID: 31935688 DOI: 10.1088/1361-648x/ab6b87] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Complex metallic alloys belong to the vast family of intermetallic compounds and are hallmarked by extremely large unit cells and, in many cases, extensive crystallographic disorder. Early studies of complex intermetallics were focusing on the elucidation of their crystal structures and classification of the underlying building principles. More recently, ab initio computational analysis and detailed examination of the physical properties have become feasible and opened new perspectives for these materials. The present review paper provides a summary of the literature data on the reported compositions with exceptional structural complexity and their properties, and highlights the factors leading to the emergence of their crystal structures and the methods of characterization and systematization of these compounds.
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Affiliation(s)
- Alexander Ovchinnikov
- Department of Materials and Environmental Chemistry, Stockholm University, Svante Arrhenius väg 16 C, 10691 Stockholm, Sweden
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11
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Kiarii EM, Govender KK, Govender PP. A theoretical study of 2D AlN on 3D C4H6N6Ni2 clathrate thermoelectric material composites. SN APPLIED SCIENCES 2019. [DOI: 10.1007/s42452-019-1696-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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12
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Kovnir K. Preface to the 50 years of solid state chemistry Anniversary Issue. J SOLID STATE CHEM 2019. [DOI: 10.1016/j.jssc.2019.06.020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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13
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Synoradzki K, Ciesielski K, Veremchuk I, Borrmann H, Skokowski P, Szymański D, Grin Y, Kaczorowski D. Thermal and Electronic Transport Properties of the Half-Heusler Phase ScNiSb. MATERIALS 2019; 12:ma12101723. [PMID: 31137868 PMCID: PMC6566183 DOI: 10.3390/ma12101723] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/13/2019] [Revised: 05/24/2019] [Accepted: 05/24/2019] [Indexed: 11/16/2022]
Abstract
Thermoelectric properties of the half-Heusler phase ScNiSb (space group F 4 ¯ 3m) were studied on a polycrystalline single-phase sample obtained by arc-melting and spark-plasma-sintering techniques. Measurements of the thermopower, electrical resistivity, and thermal conductivity were performed in the wide temperature range 2-950 K. The material appeared as a p-type conductor, with a fairly large, positive Seebeck coefficient of about 240 μV K-1 near 450 K. Nevertheless, the measured electrical resistivity values were relatively high (83 μΩm at 350 K), resulting in a rather small magnitude of the power factor (less than 1 × 10-3 W m-1 K-2) in the temperature range examined. Furthermore, the thermal conductivity was high, with a local minimum of about 6 W m-1 K-1 occurring near 600 K. As a result, the dimensionless thermoelectric figure of merit showed a maximum of 0.1 at 810 K. This work suggests that ScNiSb could be a promising base compound for obtaining thermoelectric materials for energy conversion at high temperatures.
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Affiliation(s)
- Karol Synoradzki
- Institute of Low Temperature and Structure Research, Polish Academy of Sciences, P. O. Box 1410, 50-950 Wrocław, Poland.
| | - Kamil Ciesielski
- Institute of Low Temperature and Structure Research, Polish Academy of Sciences, P. O. Box 1410, 50-950 Wrocław, Poland.
| | - Igor Veremchuk
- Max-Planck-Institut für Chemische Physik fester Stoffe, Nöthnitzer Straße 40, 01187 Dresden, Germany.
| | - Horst Borrmann
- Max-Planck-Institut für Chemische Physik fester Stoffe, Nöthnitzer Straße 40, 01187 Dresden, Germany.
| | - Przemysław Skokowski
- Institute of Molecular Physics, Polish Academy of Sciences, Smoluchowskiego 17, 60-179 Poznań, Poland.
| | - Damian Szymański
- Institute of Low Temperature and Structure Research, Polish Academy of Sciences, P. O. Box 1410, 50-950 Wrocław, Poland.
| | - Yuri Grin
- Max-Planck-Institut für Chemische Physik fester Stoffe, Nöthnitzer Straße 40, 01187 Dresden, Germany.
| | - Dariusz Kaczorowski
- Institute of Low Temperature and Structure Research, Polish Academy of Sciences, P. O. Box 1410, 50-950 Wrocław, Poland.
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