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9th Edition of

International Conference on Materials Science and Engineering

March 23-25, 2026 | Singapore

Materials 2026

The effect of substitution of Mn by Pd on the structure and thermomagnetic properties of the Mn1−xPdxCoGe alloys (where x = 0.03, 0.05, 0.07 and 0.1)

Speaker at International Conference on Materials Science and Engineering 2026 - Piotr Gebara
Politechnika Czestochowska, Poland
Title : The effect of substitution of Mn by Pd on the structure and thermomagnetic properties of the Mn1−xPdxCoGe alloys (where x = 0.03, 0.05, 0.07 and 0.1)

Abstract:

Refrigeration and temperature control involve a significant fraction of the electricity consumption nowadays. Energy efficient, environmental friendly procedures of thermal management will therefore have a direct impact on the sustainability of our way of life. Magnetocaloric refrigeration is considered among the promising technologies to achieve this goal. During talk, the influence of partial substitution of Mn by Pd on structure, thermomagnetic properties, and phase transitions in the MnCoGe alloys will be presented. The studies of phase constitution revealed an occurrence of the orthorhombic TiNiSi-type and hexagonal Ni2Ti- type phases. Deep analysis of the XRD pattern supported by the Rietveld analysis allowed us to notice the changes in lattice parameters and quantity of recognized phases depending on the Pd content. An increase of palladium in alloy composition at the expense of manganese induced a rise in the Curie temperature. The values of ΔSM measured for the variation of external magnetic field

~5 T equaled 8.88, 23.99, 15.63, and 11.09 for Mn0.97Pd0.03CoGe, Mn0.95Pd0.05CoGe, Mn0.93Pd0.07CoGe, and Mn0.9Pd0.1CoGe alloy, respectively. The highest magnetic entropy change ΔSM was observed for samples with Pd content x = 0.05 induced by magnetostructural transformation. The analysis of the n vs. T curves allowed confirmation of the XRD and DSC results of an occurrence of the first-order magnetostructural transition in Mn0.95Pd0.05CoGe and Mn0.93Pd0.07CoGe alloys samples.

Biography:

Associate Professor Piotr Gebara received his PhD degree in 2012 in Institute of Physics, Jan Długosz University in Czestochowa (Poland). DSc degree received in 2019 in Institute of Physics, Silesian University in Katowice (Poland). He did an internship in Laboratory of Nanomaterials and Applied Magnetism, Institute of Experimental Physics Slovak Academy of Sciences (Kosice, Slovakia, 2016), Institute of Molecular Physics Polish Academy of Sciences (Poznai, Poland, 2017) and Department of Condensed Matter Physics, University of Seville (Seville, Spain, 2018). In 2015, he received scholarship of Slovak Academic Information Agency and Polish Ministry of Science and Higher Education for outstanding young scientists. In 2020, he obtained  a position of Associate Professor in the Department of Physics, Czestochowa University of Technology. In the years 2019-2024 he was deputy head of the Department of Physics, and since 2024 is Vice-Dean fo Students Affairs. In 2023, Prof. Gebara was mentioned in World’s TOP 2% Scientists 2023 ranking. His published work includes more than 100 papers published in reputable international journals.  

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