Publication Date

10-17-2019

Department

Ames Laboratory

Campus Units

Ames Laboratory

OSTI ID+

1569089

Report Number

IS-J 10065

DOI

10.1039/C9TC03557E

Journal Title

Journal of Materials Chemistry C

Volume Number

7

Issue Number

40

First Page

12650

Last Page

12656

Abstract

A novel antiferromagnetic semiconductor, Eu3Sn2P4, has been discovered. Single crystals of Eu3Sn2P4 were prepared using the Sn self-flux method. The crystal structure determined by single crystal X-ray diffraction shows that Eu3Sn2P4 crystallizes in the orthorhombic structure with the space group Cmca (Pearson Symbol, oP216). Six Sn–Sn dimers connected by P atoms form a Sn12P24 crown-shaped cluster with a Eu atom located in the center. Magnetization measurements indicate that the system orders antiferromagnetically below a TN ∼14 K at a low field and undergoes a metamagnetic transition at a high field when T < TN. The effective magnetic moment is 7.41(3) μB per Eu, corresponding to Eu2+. The electric resistivity reveals a non-monotonic temperature dependence with non-metallic behavior below ∼60 K, consistent with the band structure calculations. By fitting the data using the thermally activated resistivity formula, we estimate the energy gap to be ∼0.14 eV. Below TN, the resistivity tends to saturate, suggesting the reduction of charge-spin scattering.

DOE Contract Number(s)

AC02-07CH11358; SC0016315

Language

en

Publisher

Iowa State University Digital Repository, Ames IA (United States)

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