Weak Ferromagnetism in LaCo1-xRhxO3: Anomalous Magnetism Emerging between Two Nonmagnetic End Phases

Abstract

Magnetization has been measured for polycrystalline samples of LaCo1-xRhxO3 (0 {\leq} x {\leq} 0.9) in order to investigate magnetism induced in the solid solution of two nonmagnetic end phases of LaCoO3 and LaRhO3. It is found that a ferromagnetic transition is observed below 15 K in the range of x from 0.1 to 0.4. The effective Bohr magnetic moment evaluated from the temperature dependence of magnetic susceptibility at around room temperature is independent of x for 0 < x < 0.5 (approximately 3 μB per formula unit), and rapidly decreases above x = 0.5. On the basis of detailed magnetization measurements, the spin state and magnetic ordering of LaCo1-xRhxO3 are discussed.

16 pages, 6 figures, to be published in J. Phys. Soc. Jpn

References in corpus (1)

• The spin state transition in LaCoO${}_3$; revising a revision

Cited by in corpus (6)

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• Stabilization of the high-spin state of Co${}^{3+}$ in LaCo${}_{1-x}$Rh${}_x$O${}_3$
• Ga${}^{3+}$-substitution effects in the weak ferromagnetic oxide LaCo${}_{0.8}$Rh${}_{0.2}$O${}_3$
• Spin-state responses to light impurity doping in low-spin perovskite LaCoO${}_3$
• Spin state of Co${}^{3+}$ in LaCo${}_{1-x}$Rh${}_x$O${}_3$ investigated by structural phenomena
• Unconventional magnetism in the layered oxide LaSrRhO${}_4$