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

页数：5

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