Itinerant Ferromagnetism and Metamagnetism in Cr Doped Perovskite Ruthenates

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dc.creatorDurairaj, V.
dc.creatorElhami, E.
dc.creatorChikara, S.
dc.creatorLin, X. N.
dc.creatorDouglass, A.
dc.creatorSchlottmann, G. Cao P.
dc.creatorChoi, E. S.
dc.creatorGuertin, R. P.
dc.date2005-09-04
dc.date.accessioned2026-07-07T03:06:31Z
dc.date.available2026-07-07T03:06:31Z
dc.descriptionWe report results of structural, magnetic and transport properties of single crystal CaRu1-xCrxO3 (0≤x≤0.36) and SrRu1-xCrxO3 (0≤x≤0.30). Cr substitution as low as x=0.08 drives CaRu1-xCrxO3 from the paramagnetic state to an itinerant ferromagnetic state with field-driven first-order metamagnetic transitions leading to a sizeable saturation moment (~0.4B/f.u.within the ab plane). The ferromagnetism occurs abruptly and reaches as high as TC=123 K for x=0.22. The Cr-driven ferromagnetism is highly anisotropic, suggesting an important role for spin-orbit coupling. Lattice constant and magnetic measurements strongly support the valence of the Cr as tetravalent (Cr4+, 3d2 configuration). Cr substitution for Ru in SrRuO3 (TC=165 K) enhances the itinerant ferromagnetism, with TC reaching 290 K for x=0.30, consistent with Cr-induced ferromagnetism in paramagnetic CaRuO3. Preliminary pressure-dependent magnetization of CaRu0.85Cr0.15O3 shows strong enhancement of the saturation magnetization (25% for P~0.7 GPa). All results indicate a coupling of Ru 4d and Cr 3d electrons that is unexpectedly favorable for itinerant ferromagnetism which often exists delicately in the ruthenates.
dc.description13 pages and 6 figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0509084
dc.identifierhttp://arxiv.org/abs/cond-mat/0509084
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/26835
dc.subjectStrongly Correlated Electrons
dc.titleItinerant Ferromagnetism and Metamagnetism in Cr Doped Perovskite Ruthenates
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