Publication
Article Metrics
Citations
Online attention
Ultrawide temperature range super-invar behavior of R2(Fe,Co)17 materials (R = rare earth)
DOI:
10.1103/PhysRevLett.127.055501
Authors:
Yili
Cao
(University of Science and Technology Beijing)
,
Kun
Lin
(Vienna University of Technology)
,
Sergii
Khmelevskyi
(Vienna University of Technology)
,
Maxim
Avdeev
(ustralian Nuclear Science and Technology Organisation; The University of Sydney)
,
Keith M.
Taddei
(Oak Ridge National Laboratory)
,
Qiang
Zhang
(Oak Ridge National Laboratory)
,
Qingzhen
Huang
(NIST Center for Neutron Research, National Institute of Standards and Technology)
,
Qiang
Li
(University of Science and Technology Beijing)
,
Kenichi
Kato
(RIKEN SPring- 8 Center)
,
Chiu Chung
Tang
(Diamond Light Source)
,
Alexandra
Gibbs
(ISIS Neutron and Muon Source)
,
Chin-Wei
Wang
(National Synchrotron Radiation Research Center)
,
Jinxia
Deng
(University of Science and Technology Beijing)
,
Jun
Chen
(University of Science and Technology Beijing)
,
Hongjie
Zhang
(Changchun Institute of Applied Chemistry, Chinese Academy of Sciences)
,
Xianran
Xing
(University of Science and Technology Beijing)
Co-authored by industrial partner:
No
Type:
Journal Paper
Journal:
Physical Review Letters
, VOL 127
State:
Published (Approved)
Published:
July 2021
Abstract: Super Invar (SIV), i.e., zero thermal expansion of metallic materials underpinned by magnetic ordering, is of great practical merit for a wide range of high precision engineering. However, the relatively narrow temperature window of SIV in most materials restricts its potential applications in many critical fields. Here, we demonstrate the controlled design of thermal expansion in a family of R 2 ( Fe , Co ) 17 materials ( R = rare Earth). We find that adjusting the Fe-Co content tunes the thermal expansion behavior and its optimization leads to a record-wide SIV with good cyclic stability from 3–461 K, almost twice the range of currently known SIV. In situ neutron diffraction, Mössbauer spectra and first-principles calculations reveal the 3 d bonding state transition of the Fe-sublattice favors extra lattice stress upon magnetic ordering. On the other hand, Co content induces a dramatic enhancement of the internal molecular field, which can be manipulated to achieve “ultrawide” SIV over broad temperature, composition and magnetic field windows. These findings pave the way for exploiting thermal-expansion-control engineering and related functional materials.
Journal Keywords: Thermal expansion; Ferrimagnets; Polycrystalline materials; Density functional theory; Neutron irradiation
Subject Areas:
Materials,
Physics
Facility: Advanced Photon Source
Added On:
17/08/2021 10:00
Discipline Tags:
Physics
Magnetism
Materials Science
Metallurgy
Technical Tags: