Study of spin crossover nanoparticles thermal hysteresis using FORC diagrams on an Ising-like model

被引：24

作者：

Atitoaie, Alexandru ^{[1
]}

Tanasa, Radu ^{[1
]}

Stancu, Alexandru ^{[1
]}

Enachescu, Cristian ^{[1
]}

机构：

[1] Alexandru Ioan Cuza Univ, Fac Phys, Dept Phys, Blvd Carol I 11, Iasi 700506, Romania

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2014年 / 368卷

关键词：

Spin transition; Hysteresis; Nanoparticle; FORC diagram; Ising model; Monte Carlo simulation; MEAN-FIELD APPROACH; COORDINATION POLYMERS; ROOM-TEMPERATURE; RELAXATION; TRANSITION; SOLIDS; NANOCRYSTALS; STATE;

D O I：

10.1016/j.jmmm.2014.04.054

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Recent developments in the synthesis and characterization of spin crossover (SCO) nanoparticles and their prospects of switching at molecular level turned these bistable compounds into possible candidates for replacing the materials used in recording media industry for development of solid state pressure and temperature sensors or for bringing contributions in engineering. Compared to bulk samples with the same chemical structure, SCO nanoparticles display different characteristics of the hysteretic and relaxation properties like the shift of the transition temperature towards lower values along with decrease of the hysteresis width with nanoparticles size. Using an Ising-like model with specific boundary conditions within a Monte Carlo procedure, we here reproduce most of the hysteretic properties of SCO nanoparticles by considering the interaction between spin crossover edge molecules and embedding surfactant molecules and we propose a complex analysis concerning the effect of the interactions and sizes during the thermal transition in systems of SCO nanoparticles by using the First Order Reversal Curves diagram method and by comparison with similar effects in mixed crystal systems. (C) 2014 Elsevier B.V. All rights reserved

引用

页码：12 / 18

页数：7

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