University of Seville, Seville, Spain

腾讯会议ID:  663-829-837

会议密码：1211 

Abstract：

I will cover two emerging areas of magnetocalorics in this talk, the criterion of first-order of thermomagnetic phase transition and the high-entropy alloys (a material of particular interest in recent years).

Our study found new criteria, based on the magnetocaloric effect (MCE), to determine the order of thermomagnetic phase transitions and the critical point at which first-order crossovers into second-order phase transition. Despite that it is being widely applied in the community, the analysis in multiphasic materials is not further investigated, especially in cases where their phase transitions occur nearby. We will also demonstrate how this criterion can be utilized to identify magnetic impurities, even when not immediately evident.

The high-entropy alloy (HEA) design concept has revolutionized alloy designing, leading to new materials with good mechanical properties. Applying it to magnetic materials offers a chance to develop new ones that can solve bottlenecks, especially in magnetocalorics. We will show the fascinating world of magnetocaloric HEA compositions, delving into the intricacies of HEAs located in the center of the multiprincipal elements phase diagram can lead to subpar MCE performance. A directed search strategy, on the other hand, yields a breakthrough discovery: a series of FeMnNiGe？Si？？？ HEAs boast the largest MCE reported among magnetocaloric HEAs. We'll examine the far-reaching impact of this discovery and unveil our most recent findings on the new MCE benchmark of magnetocaloric HEAs.

Brief CV of Dr. Jia Yan Law:

Dr. Jia Yan Law is a tenure track Emergia fellow who has made significant contributions to the field of HEA (high-entropy alloys) research, which she founded at the University of Seville. She has authored over 60 articles in peer-reviewed journals and 3 book chapters, with over 2800 citations. She has personally given over 19 invited talks and plenaries at international conferences. Her expertise in the field of functional high-entropy alloys and magnetocaloric materials is widely recognized, and she was recently awarded the prestigious Emergent Scientist Award by the Spanish Club of Magnetism (November 2023). She is appointed as the Editor-in-Chief of IEEE Magnetics Society Newsletter and Vice-Chair for the newly established IEEE Magnetic Society Standards, Materials, and Phenomena Subcommittee. She serves on the steering committees of several upcoming international conferences: Program Co-Chair of IEEE Nano 2024 (Gijón, Spain); Publication Chair of MMM 2025 (Florida, USA); Publication Co-Chair of 2025 Joint MMM-Intermag (New Orleans, USA).

主  持  人：胡凤霞   研究员

联  系  人：傅    琦（82649469）