Negative Thermal Expansion in the Materials With Giant Magnetocaloric Effect

Fengxia Hu; Feiran Shen; Jiazheng Hao; Yao Liu; Jing Wang; Jirong Sun; Baogen Shen

doi:10.3389/fchem.2018.00438

Negative Thermal Expansion in the Materials With Giant Magnetocaloric Effect

Front Chem. 2018 Sep 25:6:438. doi: 10.3389/fchem.2018.00438. eCollection 2018.

Authors

Fengxia Hu^{1

2}, Feiran Shen^{1

2}, Jiazheng Hao¹, Yao Liu^{1

2}, Jing Wang^{1

2}, Jirong Sun^{1

2}, Baogen Shen^{1

2}

Affiliations

¹ Beijing National Laboratory for Condensed Matter Physics and State Key Laboratory of Magnetism, Institute of Physics, Chinese Academy of Sciences, Beijing, China.
² School of Physical Sciences, University of Chinese Academy of Sciences, Beijing, China.

Abstract

Negative thermal expansion (NTE) behaviors in the materials with giant magnetocaloric effects (MCE) have been reviewed. Attentions are mainly focused on the hexagonal Ni₂In-type MM'X compounds. Other MCE materials, such as La(Fe,Si)₁₃, RCo₂, and antiperovskite compounds are also simply introduced. The novel MCE and phase-transition-type NTE materials have similar physics origin though the applications are distinct. Spin-lattice coupling plays a key role for the both effect of NTE and giant MCE. Most of the giant MCE materials show abnormal lattice expansion owing to magnetic interactions, which provides a natural platform for exploring NTE materials. We anticipate that the present review can help finding more ways to regulate phase transition and dig novel NTE materials.

Keywords: giant magnetocaloric effect; magnetostructural transition; negative thermal expansion; spin-lattice coupling; thermal compensation.

Publication types

Review