Document Type

Article

Publication Date

7-6-2011

Journal or Book Title

Physical Review B

Volume

84

Issue

16

First Page

012501

DOI

10.1103/PhysRevB.84.012501

Abstract

While the flux growth often provides the best method for obtaining single crystals of new-novel materials, the process is prone to producing crystals with trapped second-phase inclusions. In the case of NdFeAsO single crystals grown out of NaAs flux under ambient pressure, some crystals show a lambda anomaly in the specific heat curve at ~12 K. This anomaly is missing in other crystals from the same batch. We show that the lambda anomaly at 12 K is from residual NdAs starting material which is mainly on the edges of the crystals. The isothermal magnetization of LaFeAsO at 300 K clearly illustrates the effect of ferromagnetic impurities on the magnetic properties of LaFeAsO crystals.

Comments

This article is from Physical Review B 84 (2011): 012501, doi:10.1103/PhysRevB.84.012501.

Copyright Owner

American Physical Society

Language

en

File Format

application/pdf

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