Diffusion-limited kinetics of the antiferromagnetic to ferrimagnetic λ-transition in Fe1-xS

被引：17
|
作者：
Herbert, F. William [1 ,2 ,3 ]
Krishnamoorthy, Aravind [1 ,2 ]
Yildiz, Bilge [1 ,2 ,4 ]
Van Vliet, Krystyn J. [1 ,3 ]
机构：
[1] MIT, Dept Mat Sci & Engn, Cambridge, MA 02139 USA
[2] MIT, Lab Electrochem Interfaces, Cambridge, MA 02139 USA
[3] MIT, Lab Mat Chemomech, Cambridge, MA 02139 USA
[4] MIT, Dept Nucl Sci & Engn, Cambridge, MA 02139 USA
来源：
APPLIED PHYSICS LETTERS | 2015年 / 106卷 / 09期
关键词：
DEFICIENT IRON SULFIDE; PHASE-RELATIONS; TEMPERATURES; PYRRHOTITE; RELAXATION; DYNAMICS;
D O I：
10.1063/1.4913201
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Fe1-xS (0.08 <= x <= 0.11) exhibits a simultaneous magneto-structural "lambda-transition" at approximately 200 degrees C. Time-dependent magnetization measurements demonstrate the lambda-transition can be accurately modeled by a stretched exponential function, consistent with a nucleation-free, continuous reordering of the vacancy-bearing sublattice. The experimental result is supported by kinetic Monte Carlo simulations that confirm the activation energy for the transition to be 1.1 +/- 0.1 eV-representing the iron vacancy migration energy in ordered Fe1-xS. A mechanistic understanding of the lambda-transition enables potential functional uses of Fe1-xS such as thermally activated magnetic memory, switches, or storage. (C) 2015 AIP Publishing LLC.
引用
收藏
页数：5
相关论文
共 50 条
12345