中国科学院合肥物质科学研究院强磁场科学中心坐落于安徽省合肥市风景秀丽的科学岛,2008年4月30日经中国科学院批准成立,依托中国科学院合肥物质科学研究院管理(科发人教字〔2008〕133号),其前身是2005年12月20日成立的“合肥强磁场科学技术研究中心”。中心目标:发展强磁... 更多简介 +
稳态强磁场实验装置(Steady High Magnetic Field Facility,简称SHMFF)是国家发改委支持的“十一五”国家重大科技基础设施。SHMFF法人单位是中国科学院合肥物质科学研究院,共建单位是中国科学技术大学。各项任务以中国科学院强磁场科学中心为依托完成... 更多简介 +
报告人:Victorino Franco 教授(西班牙塞维利亚大学)
报告地点:强磁场中心磁体楼201会议室
报告时间:9月26日上午10:00-11:00 (星期四)
个人介绍:Victorino Franco教授于1999年毕业于西班牙塞维利亚大学并获得理学博士学位。现为塞维利亚大学凝聚态物理系教授。研究兴趣包括:磁性非晶/纳米晶合金的微结构与磁性;纳米晶材料的磁各向异性;纳米结构材料的磁相互作用;磁热效应和磁致冷。
报告题目:GAINING INFORMATION OF PHASE TRANSITIONS AND CRITICAL PHENOMENA VIA MAGNETOCALORIC STUDIES
摘要:
The increasing concern of modern societies about energy efficiency, together with the fact that temperature control accounts for a large portion of the energy consumption at homes and commercial buildings, has fostered research on the applicability of magnetocaloric materials for magnetic refrigeration. Most of the current studies on magnetocaloric materials focus on the optimization of their properties for room temperature magnetic refrigeration. The aim of this talk is to show that MCE can be used for characterizing magnetic phase transitions. We will present examples in which the critical exponents and transition temperatures could be determined (even when standard techniques could not be applied), cases in which the scaling nature of MCE is used to determine the order of a phase transition (even when the Banerjee criterion gave misleading results), or how tailoring the microstructure of a material at the nanoscale can lead to magnetocaloric responses which are qualitatively different from the bulk. This deeper understanding of the phase transitions giving rise to MCE should create paths along which new applications of these materials should be found.
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