The structural, magnetic, electrical/thermal transport properties and reversible magnetocaloric effect in Fe-based antipervoskite compound AlC1.1Fe3

Lin, Shuai; Wang, Bosen; Hu, Xiaolong; Lin, Jiamao; Huang, Yang; Jian, Hongbin; Lu, W. J.; Tong, P.; Song, Wenhai; Sun, Ying

doi:10.1016/j.jmmm.2012.05.022

Cited by 13 publications

(5 citation statements)

References 39 publications

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“…Such a unique AFM configuration does not exist in Fe-nor Co-based antiperovskite compounds that show normal positive thermal expansion rather than NTE. [34][35][36]40] In fact, the height of peak in (C − γT )/T 3 versus T in antiperovksite compound (≤ 0.35 mJ•K −4 •mol −1 ) is lower than in ScF 3 (∼ 0.55 mJ•K −4 •mol −1 ). [54] The relevant peak positions of antiperovskite compounds (between 10 K-30 K) are much higher than that of ScF 3 (a few K).…”

Section: Resultsmentioning

confidence: 94%

“…All polycrystalline samples were made by standard solid state reaction and the structural characterizations and their physical properties have been reported elsewhere. [34][35][36][37][38][39][40][41][42][43] Take antiperovskite compound GaCMn 3 for example, the starting materials including powders of manganese (4N), graphite (3N), and gallium (5N) were mixed in a stoichiometric proportion and sealed in an evacuated quartz tube. The sample was sintered in a box furnace at 1073 K-1123 K for 8 days, then cooled down to room temperature.…”

Section: Methodsmentioning

confidence: 99%

“…For these samples, x-ray diffraction peaks can be indexed with the cubic antiperovskite structure (space group, Pm−3m). [34][35][36][37][38][39][40][41][42][43] In some AXMn 3 compounds, a small amount of MnO impurity (less than 3%) may exist, [38,43] which does not affect the specific heat analysis. The heat capacity measurements were performed by a relaxation method using a commercial Quantum Design Physical Property Measurement System (PPMS) (1.8 K≤ T ≤ 800 K, 0 ≤ H ≤ 90 kOe).…”

Section: Methodsmentioning

confidence: 99%

“…Heat specific data for most samples were reported in previous work, [34][35][36][37][38][39][40][41] and all the original heat capacities are plotted in supplementary materials.…”

Section: Methodsmentioning

confidence: 99%

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Anomalous low-temperature heat capacity in antiperovskite compounds

et al. 2017

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The low-temperature heat capacities are studied for antiperovskite compounds AXM 3 (A = Al, Ga, Cu, Ag, Sn, X = C, N, M = Mn, Fe, Co). A large peak in (C − γT )/T 3 versus T is observed for each of a total of 18 compounds investigated, indicating an existence of low-energy phonon mode unexpected by Debye T 3 law. Such a peak is insensitive to the external magnetic field up to 80 kOe (1 Oe = 79.5775 A•m −1 ). For compounds with smaller lattice constant, the peak shifts towards higher temperatures with a reduction of peak height. This abnormal peak in (C − γT )/T 3 versus T of antiperovskite compound may result from the strongly dispersive acoustic branch due to the heavier A atoms and the optical-like mode from the dynamic rotation of XM 6 octahedron. Such a low-energy phonon mode may not contribute negatively to the normal thermal expansion in AXM 3 compounds, while it is usually concomitant with negative thermal expansion in open-structure material (e.g., ZrW 2 O 8 , ScF 3 ).

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Section: Resultsmentioning

confidence: 94%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

“…Heat specific data for most samples were reported in previous work, [34][35][36][37][38][39][40][41] and all the original heat capacities are plotted in supplementary materials.…”

Section: Methodsmentioning

confidence: 99%

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Anomalous low-temperature heat capacity in antiperovskite compounds

et al. 2017

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“…Recently, considerable attention has been paid to the Fe-based antiperovskite compounds due to their interesting physical and mechanical properties, such as low temperature coefficient of resistance (LTCR) [16], magnetocaloric effect (MCE) [13,17,18], and good corrosion resistance [19,20]. GaCFe 3 has been investigated for several decades as a typical Fe-based antiperovskite compound.…”

Section: Introductionmentioning

confidence: 99%

The Magnetic/Electrical Phase Diagram of Cr-Doped Antiperovskite CompoundsGaCFe3−xCrx(0≤

Lin

Wang

Tong

et al. 2013

Advances in Condensed Matter Physics

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We report the effect of Cr doping on the structural, magnetic, and electrical transport properties in Cr-doped antiperovskite compoundsGaCFe3−xCrx(0≤x≤0.9). With increasing the Cr contentx, the lattice constant increases while both the Curie temperature and the saturated magnetization decrease gradually. The electrical resistivity shows different behaviors as a function ofx. Forx≤0.6, there exists a semiconductor-like behavior below a certain temperature which decreases with increasingx. In contrast, for0.7≤x≤0.9, the resistivity shows a metallic behavior in the whole temperature measured (2–350 K). In particular, the Fermi-liquid behavior is obtained below 70 K. Finally, based on the magnetic and electrical properties ofGaCFe3−xCrx(0≤x≤0.9) a magnetic/electrical phase diagram was plotted.

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