Disorder-induced ferromagnetism in CaRuo3

T. He; R. J. Cava

doi:10.1103/PhysRevB.63.172403

Disorder-induced ferromagnetism in CaRuo₃

T. He, R. J. Cava

Research output: Contribution to journal › Article › peer-review

104 Scopus citations

Abstract

The magnetic ground state of perovskite structure CaRuo₃ has been enigmatic for decades. Here we show that paramagnetic CaRuo₃ can be made ferromagnetic by very small amounts of partial substitution of Ru by Ti. Magnetic hysteresis loops are observed at 5 K for as little as 2% Ti substitution. Ti is nonmagnetic and isovalent with Ru, indicating that the primary effect of the substitution is the disruption of the magnetic ground state of CaRuo₃ through disorder. The data suggest that CaRuo₃ is poised at a critical point between ferromagnetic and paramagnetic ground states.

Original language	English (US)
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	63
Issue number	17
DOIs	https://doi.org/10.1103/PhysRevB.63.172403
State	Published - 2001

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1103/PhysRevB.63.172403

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abstract = "The magnetic ground state of perovskite structure CaRuo3 has been enigmatic for decades. Here we show that paramagnetic CaRuo3 can be made ferromagnetic by very small amounts of partial substitution of Ru by Ti. Magnetic hysteresis loops are observed at 5 K for as little as 2% Ti substitution. Ti is nonmagnetic and isovalent with Ru, indicating that the primary effect of the substitution is the disruption of the magnetic ground state of CaRuo3 through disorder. The data suggest that CaRuo3 is poised at a critical point between ferromagnetic and paramagnetic ground states.",

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AU - Cava, R. J.

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AB - The magnetic ground state of perovskite structure CaRuo3 has been enigmatic for decades. Here we show that paramagnetic CaRuo3 can be made ferromagnetic by very small amounts of partial substitution of Ru by Ti. Magnetic hysteresis loops are observed at 5 K for as little as 2% Ti substitution. Ti is nonmagnetic and isovalent with Ru, indicating that the primary effect of the substitution is the disruption of the magnetic ground state of CaRuo3 through disorder. The data suggest that CaRuo3 is poised at a critical point between ferromagnetic and paramagnetic ground states.

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Disorder-induced ferromagnetism in CaRuo₃

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