Work

Large magnetoresistance effects in Ln CoAsO ( Ln= Nd, Sm) with a ferromagnetic-antiferromagnetic transition

Year: 2011

Type: article

Abstract: A large magnetoresistance (MR) effect was observed in the layered compounds NdCoAsO and SmCoAsO, in which ferromagnetically ordered itinerant electrons of Co are sandwiched by localized 4$f$ electrons of $L{n}^{3+}$ below ferromagnetic-antiferromagnetic transition (FAFT) temperature ${T}_{\mathrm{N}}$ as observed in other FAFT compounds. In SmCoAsO, the large MR effect is also observed up to the Curie temperature ${T}_{\mathrm{C}}$, and it is found to be originating in the presence of another antiferromagnetic phase in the low-magnetic-field region of the ferromagnetic phase.

Source: Physical Review B

DOI: 10.1103/physrevb.84.134411

Authors: Hiroto Ohta, Chishiro Michioka, Kazuyoshi Yoshimura

Institution: Kyoto University

Language: English

Topic: Magnetic and transport properties of perovskites and related materials

Subfield: Electronic, Optical and Magnetic Materials

Field: Materials Science

Domain: Physical Sciences

Open Access status: green

Funder: Japan Society for the Promotion of Science

Awards: Research of the novel physical properties of the itinerant-electrons on the frustrated compounds, Syntheses of New 2-Dimensional Itinerant-Electron Compounds and Search for Novel Physical Properties