Metal-to-insulator transition and magnetic ordering in CaRu1-xCuxO3
Abstract
CaRuO3 is a perovskite with an orthorhombic distortion, and is believed to be close to magnetic ordering. Magnetic studies of single-crystal and polycrystalline CaRu1-xCuxO3 (0less than or equal toxless than or equal to15 at. %Cu) reveal that a spin-glass-like transition develops for xless than or equal to7 at. % Cu. The obtained value for the effective magnetic moment p(eff) =3.55 mu(B) for an x=5 at. % Cu single crystal, indicates the presence of Ru5+. At higher Cu concentrations more complex magnetic behaviors are observed. Electrical resistivity measured on polycrystalline samples shows a metal-to-insulator transition at 51 K for only 2-at. % Cu. Charge compensation, which is assumed to be present upon Cu2+/3+ substitution, induces the appearance of Ru5+ and/or the creation of oxygen vacancies in a crystal structure. Since the observed changes in physical properties are completely attributable to the charge compensation, they cannot be related to behaviors of a pure compound where ...no such mechanism is present. This study provides the criterion for good chemical probes for studying Ru-based perovskites.
Source:
Physical Review B: Condensed Matter and Materials Physics, 2002, 65, 2
DOI: 10.1103/PhysRevB.65.024421
ISSN: 2469-9950; 2469-9969
WoS: 000173213100066
Scopus: 2-s2.0-85038308605
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VinčaTY - JOUR AU - Bradarić, Ivica AU - Felner, I AU - Gospodinov, M PY - 2002 UR - https://vinar.vin.bg.ac.rs/handle/123456789/2493 AB - CaRuO3 is a perovskite with an orthorhombic distortion, and is believed to be close to magnetic ordering. Magnetic studies of single-crystal and polycrystalline CaRu1-xCuxO3 (0less than or equal toxless than or equal to15 at. %Cu) reveal that a spin-glass-like transition develops for xless than or equal to7 at. % Cu. The obtained value for the effective magnetic moment p(eff) =3.55 mu(B) for an x=5 at. % Cu single crystal, indicates the presence of Ru5+. At higher Cu concentrations more complex magnetic behaviors are observed. Electrical resistivity measured on polycrystalline samples shows a metal-to-insulator transition at 51 K for only 2-at. % Cu. Charge compensation, which is assumed to be present upon Cu2+/3+ substitution, induces the appearance of Ru5+ and/or the creation of oxygen vacancies in a crystal structure. Since the observed changes in physical properties are completely attributable to the charge compensation, they cannot be related to behaviors of a pure compound where no such mechanism is present. This study provides the criterion for good chemical probes for studying Ru-based perovskites. T2 - Physical Review B: Condensed Matter and Materials Physics T1 - Metal-to-insulator transition and magnetic ordering in CaRu1-xCuxO3 VL - 65 IS - 2 DO - 10.1103/PhysRevB.65.024421 ER -
@article{ author = "Bradarić, Ivica and Felner, I and Gospodinov, M", year = "2002", abstract = "CaRuO3 is a perovskite with an orthorhombic distortion, and is believed to be close to magnetic ordering. Magnetic studies of single-crystal and polycrystalline CaRu1-xCuxO3 (0less than or equal toxless than or equal to15 at. %Cu) reveal that a spin-glass-like transition develops for xless than or equal to7 at. % Cu. The obtained value for the effective magnetic moment p(eff) =3.55 mu(B) for an x=5 at. % Cu single crystal, indicates the presence of Ru5+. At higher Cu concentrations more complex magnetic behaviors are observed. Electrical resistivity measured on polycrystalline samples shows a metal-to-insulator transition at 51 K for only 2-at. % Cu. Charge compensation, which is assumed to be present upon Cu2+/3+ substitution, induces the appearance of Ru5+ and/or the creation of oxygen vacancies in a crystal structure. Since the observed changes in physical properties are completely attributable to the charge compensation, they cannot be related to behaviors of a pure compound where no such mechanism is present. This study provides the criterion for good chemical probes for studying Ru-based perovskites.", journal = "Physical Review B: Condensed Matter and Materials Physics", title = "Metal-to-insulator transition and magnetic ordering in CaRu1-xCuxO3", volume = "65", number = "2", doi = "10.1103/PhysRevB.65.024421" }
Bradarić, I., Felner, I.,& Gospodinov, M.. (2002). Metal-to-insulator transition and magnetic ordering in CaRu1-xCuxO3. in Physical Review B: Condensed Matter and Materials Physics, 65(2). https://doi.org/10.1103/PhysRevB.65.024421
Bradarić I, Felner I, Gospodinov M. Metal-to-insulator transition and magnetic ordering in CaRu1-xCuxO3. in Physical Review B: Condensed Matter and Materials Physics. 2002;65(2). doi:10.1103/PhysRevB.65.024421 .
Bradarić, Ivica, Felner, I, Gospodinov, M, "Metal-to-insulator transition and magnetic ordering in CaRu1-xCuxO3" in Physical Review B: Condensed Matter and Materials Physics, 65, no. 2 (2002), https://doi.org/10.1103/PhysRevB.65.024421 . .