We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
A Material Showing Colossal Positive and Negative Volumetric Thermal Expansion with Hysteretic Magnetic Transition.
- Authors
Hu, Ji‐Xiang; Xu, Yang; Meng, Yin‐Shan; Zhao, Liang; Hayami, Shinya; Sato, Osamu; Liu, Tao
- Abstract
It is an ongoing challenge to design and synthesize magnetic materials that undergo colossal thermal expansion and that possess potential applications as microscale or nanoscale actuators with magnetic functionality. A paramagnetic metallocyanate building block was used to construct a cyanide-bridged Fe-Co complex featuring both positive and negative colossal volumetric thermal-expansion behavior. A detailed study revealed that metal-to-metal charge transfer between 180 and 240 K induced a volumetric thermal expansion coefficient of 1498 MK−1 accompanied with hysteretic spin transition. Rotation of the magnetic building blocks induced change of π⋅⋅⋅π interactions, resulting in a negative volume expansion coefficient of −489 MK−1, and another hysteretic magnetic transition between 300 and 350 K. This work presents a strategy for incorporating both colossal positive and negative volumetric thermal expansion with shape and magnetic memory effects in a material.
- Subjects
SPIN crossover; COLLISIONS (Nuclear physics); CHARGE carriers; THERMAL expansion; THERMODYNAMICS
- Publication
Angewandte Chemie, 2017, Vol 129, Issue 42, p13232
- ISSN
0044-8249
- Publication type
Article
- DOI
10.1002/ange.201707258