Crystal Structure and Magnetism of Noncentrosymmetric Eu2Pd2Sn
| Autor: | Mauro Giovannini, Riccardo Freccero, Marián Reiffers, Pavlo Solokha, J. G. Sereni, I. Čurlík |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Condensed matter physics
010405 organic chemistry Magnetism Chemistry Intermetallic Crystal structure 010402 general chemistry 01 natural sciences Heat capacity Magnetic susceptibility 0104 chemical sciences Ion Inorganic Chemistry Antiferromagnetism Physical and Theoretical Chemistry Single crystal |
| Popis: | The new intermetallic compound Eu2Pd2Sn has been investigated. A single crystal was selected from the alloy and was analyzed by single-crystal X-ray diffraction, revealing that this compound possesses the noncentrosymmetric Ca2Pd2Ge structure type being, so far, the only rare-earth-based representative. Bonding analysis, performed on the basis of DOS and (I)COHP, reveals the presence of strong covalent Sn-Pd bonds in addition to linear and equidistant Pd-Pd chains. The incomplete ionization of Eu leads to its participation in weaker covalent interactions. The magnetic effective moment, extracted from the magnetic susceptibility χ(T) is μeff = 7.87 μB, close to the free ion Eu2+ value (μeff = 7.94 μB). The maximum of χ(T) at TN ∼ 13 K indicates an antiferromagnetic behavior below this temperature. A coincident sharp anomaly in the specific heat CP(T) emerges from a broad anomaly centered at around 10 K. From the reduced jump in the heat capacity at TN a scenario of a transition to an incommensurate antiferromagnetic phase below TN followed by a commensurate configuration below 10 K is suggested. |
| Databáze: | OpenAIRE |
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