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U D R, K A, S S, S R A, Dzubinska A, Reiffers M, Ramamoorthi N. Griffiths-like behavior and magnetocaloric properties of rare-earth silicide Tb 2Co 0.8Si 3.2. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2024; 36:195806. [PMID: 38306711 DOI: 10.1088/1361-648x/ad2586] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/07/2023] [Accepted: 02/02/2024] [Indexed: 02/04/2024]
Abstract
Novel rare-earth silicide, Tb2Co0.8Si3.2compound, crystallizes in Lu2CoGa3structure, a distorted substitution variant of theAlB2structure. The compound exhibits a complex magnetic state, with a ferromagnetic transition at 58 K, followed by successive antiferromagnetic transitions at 24 K and 8 K, respectively. Isothermal and magnetic hysteresis studies indicate the prominence of competing antiferro and ferromagnetic interactions in the compound. However, this does not lead to the formation of spin glass behavior, as confirmed by AC magnetic susceptibility and heat capacity studies. In the paramagnetic state, the short-range ferromagnetic ordering of cobalt creates a Griffiths-like anomaly that is suppressed at higher magnetic fields. Investigation of magnetocaloric and magnetoresistance properties identifies the compound as a conventional second-order magnetocaloric material with negative magnetoresistance. Furthermore, the determination of Landau coefficients and subsequent analysis indicate that the isothermal entropy change of the compound can be calculated from these coefficients.
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Affiliation(s)
- Remya U D
- Intermetallics and Non-Linear Optics Laboratory, Department of Physics, National Institute of Technology, Tiruchirappalli 620 015, India
| | - Arun K
- Intermetallics and Non-Linear Optics Laboratory, Department of Physics, National Institute of Technology, Tiruchirappalli 620 015, India
| | - Swathi S
- Intermetallics and Non-Linear Optics Laboratory, Department of Physics, National Institute of Technology, Tiruchirappalli 620 015, India
| | - Athul S R
- Intermetallics and Non-Linear Optics Laboratory, Department of Physics, National Institute of Technology, Tiruchirappalli 620 015, India
| | | | - Marian Reiffers
- Faculty of Humanities and Natural Sciences, Presov University, Presov, Slovakia
- Institute of Experimental Physics, SAS, Kosice, Slovakia
| | - Nagalakshmi Ramamoorthi
- Intermetallics and Non-Linear Optics Laboratory, Department of Physics, National Institute of Technology, Tiruchirappalli 620 015, India
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Spitz L, Nomoto T, Kitou S, Nakao H, Kikkawa A, Francoual S, Taguchi Y, Arita R, Tokura Y, Arima TH, Hirschberger M. Entropy-Assisted, Long-Period Stacking of Honeycomb Layers in an AlB 2-Type Silicide. J Am Chem Soc 2022; 144:16866-16871. [PMID: 36066406 DOI: 10.1021/jacs.2c04995] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Configurational entropy can impact crystallization processes, tipping the scales between structures of nearly equal internal energy. Using alloyed single crystals of Gd2PdSi3 in the AlB2-type structure, we explore the formation of complex layer sequences made from alternating, two-dimensional triangular and honeycomb slabs. A four-period and an eight-period stacking sequence are found to be very close in internal energy, the latter being favored by entropy associated with covering the full configuration space of interlayer bonds. Possible consequences of polytype formation on magnetism in Gd2PdSi3 are discussed.
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Affiliation(s)
- Leonie Spitz
- RIKEN Center for Emergent Matter Science (CEMS), Wako, Saitama 351-0198, Japan
| | - Takuya Nomoto
- Department of Applied Physics and Quantum-Phase Electronics Center (QPEC), The University of Tokyo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Shunsuke Kitou
- RIKEN Center for Emergent Matter Science (CEMS), Wako, Saitama 351-0198, Japan
| | - Hironori Nakao
- Institute of Materials Structure Science, High Energy Accelerator Research Organization, Tsukuba, Ibaraki 305-0801, Japan
| | - Akiko Kikkawa
- RIKEN Center for Emergent Matter Science (CEMS), Wako, Saitama 351-0198, Japan
| | - Sonia Francoual
- Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, 22607 Hamburg, Germany
| | - Yasujiro Taguchi
- RIKEN Center for Emergent Matter Science (CEMS), Wako, Saitama 351-0198, Japan
| | - Ryotaro Arita
- RIKEN Center for Emergent Matter Science (CEMS), Wako, Saitama 351-0198, Japan.,Department of Applied Physics and Quantum-Phase Electronics Center (QPEC), The University of Tokyo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Yoshinori Tokura
- RIKEN Center for Emergent Matter Science (CEMS), Wako, Saitama 351-0198, Japan.,Department of Applied Physics and Quantum-Phase Electronics Center (QPEC), The University of Tokyo, Bunkyo-ku, Tokyo 113-8656, Japan.,Tokyo College, The University of Tokyo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Taka-Hisa Arima
- RIKEN Center for Emergent Matter Science (CEMS), Wako, Saitama 351-0198, Japan.,Department of Advanced Materials Science, University of Tokyo, Kashiwa, Chiba 277-8561, Japan
| | - Max Hirschberger
- RIKEN Center for Emergent Matter Science (CEMS), Wako, Saitama 351-0198, Japan.,Department of Applied Physics and Quantum-Phase Electronics Center (QPEC), The University of Tokyo, Bunkyo-ku, Tokyo 113-8656, Japan
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Leisegang T, Levin AA, Kupsch A. From the Ritter pile to the aluminum ion battery – Peter Paufler’s academic genealogy. Z KRIST-CRYST MATER 2020. [DOI: 10.1515/zkri-2020-0063] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
This article highlights Peter Paufler’s academic genealogy on the occasion of his 80th birthday. We describe the academic background since 1776, which covers 11 generations of scientists: Ritter, Ørsted, Han-steen, Keilhau, Kjerulf, Brøgger, Goldschmidt, Schulze, Paufler, Meyer, and Leisegang. The biographies of these scientists are described in spotlight character and references to scientists such as Dehlinger, Ewald, Glocker, Röntgen, Vegard, Weiss, and Werner are given. A path is drawn that begins in the Romanticism with electrochemistry and the invention of what is probably the first accumulator. It leads through the industrialization and the modern geology, mineralogy, and crystallography to crystal chemistry, metal and crystal physics and eventually returns to electrochemistry and the aluminum-ion accumulator in the era of the energy transition. The academic genealogy exhibits one path of how crystallography develops and specializes over three centuries and how it contributes to the understanding of the genesis of the Earth and the Universe, the exploration of raw materials, and the development of modern materials and products during the industrialization and for the energy transition today. It is particularly characterized by the fields of physics and magnetism, X-ray analysis, and rare-earth compounds and has strong links to the scientific landscape of Germany (Freiberg) and Scandinavia, especially Norway (Oslo), as well as to Russia (Moscow, Samara, St. Petersburg). The article aims at contributing to the history of science, especially to the development of crystallography, which is the essential part of the structural science proposed by Peter Paufler.
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Affiliation(s)
- Tilmann Leisegang
- Institut für Experimentelle Physik, TU Bergakademie Freiberg , Leipziger Str. 23 , 09599 Freiberg , Germany
- Samara Center for Theoretical Materials Science, Samara State Technical University , Molodogvardeyskaya St. 244 , 443100 Samara , Russia
| | - Aleksandr A. Levin
- Ioffe Institute , Politekhnicheskaya 26 , 194021 St. Petersburg , Russia
| | - Andreas Kupsch
- Bundesanstalt für Materialforschung und -prüfung (BAM) , Unter den Eichen 87 , 12205 Berlin , Germany
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