Non-uniform magnetic system driven by non-magnetic ion substitution in CaRu1-xScxO3:Two-component analysis

TL;DR

This study investigates how substituting non-magnetic Sc ions into CaRuO3 affects its magnetic and transport properties, revealing a non-uniform magnetic system with coexisting ferromagnetic and paramagnetic components.

Contribution

It provides a two-component analysis of magnetic behavior in CaRu1-xScxO3, highlighting the coexistence of ferromagnetic and paramagnetic contributions due to non-magnetic ion substitution.

Findings

Ferromagnetic transition observed at 30 K in Sc-substituted samples

Magnetic susceptibility shows both paramagnetic and ferromagnetic contributions

CaRu1-xScxO3 is identified as a non-uniform magnetic system

Abstract

We have studied magnetic and transport properties in polycrystalline CaRu1-xScxO3 for 0 =< x =< 0.20 in order to clarify the substitution effects of a non-magnetic trivalent ion. We find that a ferromagnetic transition with Tc = 30 K is observed in Sc-substituted samples. The composition dependence of the Curie-Weiss temperature implies that the magnetic susceptibility has a paramagnetic contribution with negative theta and a ferromagnetic contribution with positive theta. The field dependence of magnetization at 2 K is also understood as a summation of the ferromagnetic and paramagnetic components. These results suggest that CaRu1-xScxO3 is a non-uniform magnetic system. The relationship between the ferromagnetic ordering and the transport properties is also discussed.