Affordable Access

Publisher Website

Itinerant ferromagnetism to insulating spin glass in SrRu1− xCuxO3(0 ≤ x ≤ 0.3)

Authors
Journal
Materials Research Bulletin
0025-5408
Publisher
Elsevier
Publication Date
Volume
44
Issue
3
Identifiers
DOI: 10.1016/j.materresbull.2008.07.004
Keywords
  • A. Ceramics
  • C. X-Ray Diffraction
  • D. Magnetic Properties
  • D. Phase Transitions
Disciplines
  • Physics

Abstract

Abstract The ferromagnetic metallic oxide, SrRuO 3 ( T C ∼ 165 K) undergoes structural, magnetic and metal–insulator transitions upon substitution of Cu at the Ru-site. For x = 0.2 in SrRu 1− x Cu x O 3, the structure becomes a tetragonal with the space group I4/ mcm and there is a signature of both ferromagnetic ( T C = 65 K) and antiferromagnetic ( T N = 32 K) ordering due to possible magnetic phase separation. The antiferromagnetism arises due to short range ordering of Cu- and Ru-moments. Jahn–Teller distortion of (Ru,Cu)–O 6 octahedra indicates that the copper ions are in 2+ oxidation state with t 2 g 6 e g 3 electronic configuration. For x ≥ 0.1, narrowing of Ru-4d bandwidth by the substitution of Cu ions results in semiconducting behavior. For x = 0.3, the ac and dc susceptibility measurements indicate a spin glass behavior. The origin of spin glass behavior has been attributed to competing ferromagnetic and antiferromagnetic interactions.

There are no comments yet on this publication. Be the first to share your thoughts.