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No.2(pp.79-102)

Home > Issues > Volume 8 (2003) > No.2(pp.79-102)

Collapse of Charge Ordering in Ru-doped Mono-layered Manganites

Journal of Magnetics, Volume 8, Number 2, 30 Jun 2003, Pages 85-88

Chang-Seop Hong(Department of Chemistry, Korea University), Wan-Seop Kim(Korea Research Institute of Standards and Science), Nam-Hwi Hur*

(Korea Research Institute of Standards and Science)

Abstract

The magnetic and transport properties far single crystals of Ru-doped mono-layered manganites La_0.5Sr_1.5-Mn_1-xRu_xO₄ (0 ≤ x ≤ 0.1) have been studied using neutron diffraction and magnetization measurements. Temperature dependent magnetization data reveal that with an increase in the Ru concentration the parent charge ordered antiferromagnetic state is gradually destroyed and new ferromagnetic phase evolves. In the low Ru-doped system spin glass behavior is apparent in low temperature region, which is confirmed by ac and do magnetization measurements. The competing magnetic interaction between Mn/Mn and Mn/Ru couples is the most likely cause of the spin glass transition.

Keywords: magnetism; charge ordering; manganite; magneto resistance; spin glass

DOI:

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