Campus Units

Chemistry, Materials Science and Engineering

Document Type

Article

Publication Version

Published Version

Publication Date

2013

Journal or Book Title

Physical Review Letters

Volume

10

Issue

077204

First Page

1017

Last Page

5

DOI

10.1103/PhysRevLett.110.077204

Abstract

The correlation between magnetic and structural transitions in Gd5SixGe4−x hampers the studies of valence electron concentration (VEC) effects on magnetism. Such studies require decoupling of the VEC-driven changes in the magnetic behavior and crystal structure. The designed compounds, Gd5GaSb3 and Gd5GaBi3, adopt the same Sm5Ge4-type structure as Gd5Ge4 while the VEC increases from 31  e−/formula in Gd5Ge4 to 33  e−/formula in Gd5GaPn3 (Pn: pnictide atoms). As a result, the antiferromagnetic ground state in Gd5Ge4 is tuned into the ferromagnetic one in Gd5GaPn3. First-principles calculations reveal that the nature of interslab magnetic interactions is changed by introducing extra p electrons into the conduction band, forming a ferromagnetic bridge between the adjacent [∝2Gd5T4] slabs.

Comments

This article is from Physical Review Letters 110 (2013): 1, doi:10.1103/PhysRevLett.110.077204. Posted with permission.

Copyright Owner

American Physical Society

Language

en

File Format

application/pdf

Share

COinS