By virtue of the unique advantages of compensating and controlling thermal expansion,
negative thermal expansion (NTE) materials have attracted great attention and have gained …

Negative thermal expansion (NTE) is an intriguing physical property of solids, which is a
consequence of a complex interplay among the lattice, phonons, and electrons …

Kamihara and coworkers' report of superconductivity at T c= 26 K in fluorine-doped
LaFeAsO inspired a worldwide effort to understand the nature of the superconductivity in this …

The response of the worldwide scientific community to the discovery in 2008 of
superconductivity at T c= 26 K in the Fe-based compound LaFeAsO1− x F x has been very …

High-transition temperature (high-T c) superconductivity in the iron pnictides or
chalcogenides emerges from the suppression of the static antiferromagnetic order in their …

Abstract Recently, high-transition-temperature (high-T c) superconductivity was discovered
in the iron pnictide RFeAsO1− x F x (R, rare-earth metal) family of materials. We use neutron …

We use bulk magnetic susceptibility, electronic specific heat, and neutron scattering to study
structural and magnetic phase transitions in Fe 1+ y Se x Te 1− x. Fe 1.068 Te exhibits a first …

In this review, we present a summary of experimental studies of magnetism in Fe-based
superconductors. The doping dependent phase diagram shows strong similarities to the …

The magnetic excitations of the iron pnictides are explained within a degenerate double-
exchange model. The local-moment spins are coupled by superexchanges J 1 and J 2 …

Among various parent compounds of iron pnictide superconductors, EuFe 2 As 2 stands out
due to the presence of both spin density wave of Fe and antiferromagnetic (AFM) ordering of …