Electrons matter in ferromagnetic criticality

• 作者: Joe D.Thompson Jon M.Lawrence
• 来源期刊: 科学通报（英文版）
• 年，卷（期）: 2021,（14）
• 所属期刊栏目: NEWS & VIEWS
• 页码范围: 1369-1371
• 页数: 3页
• 语种: 英文

摘要

When elemental iron is cooled from high temperatures,mag-netic moments carried by its d-electrons begin a continuous tran-sition to a state of parallel aligned moments below its Curie temperature Tc of about 1040 K.As established in the mid-1900s,the statistical physics of this second order phase transition is uni-versal,independent of the ordering temperature,material struc-ture and chemical composition as well as the character of moment-bearing electrons.The thermodynamics of the phase transition is determined solely by symmetries of the transition's order parameter-magnetization in the case of a ferromagnet[1].