Magnetic ordering in LaCo1-xRhxO3 (x = 0.4, 0.5 and 0.6)
Both LaCoO3 and LaRhO3 are nonmagnetic compounds below room temperature. However, the substitution of Rh at the Co site stabilizes the high spin state of Co3+ ions and ferromagnetic-like ordering has been reported for compounds LaCo1-xRhxO3 with x in the range from 0.1 to 0.4. Our recent first neutron powder diffraction experiments on the half-doped compound (x = 0.5) reveal that additional peaks appear at low temperatures, indicating possible antiferromagnetic transitions. These results suggest a drastic change of the ground state around x = 0.5. In order to study the magnetic ordering in the vicinity of x = 0.5, and clarify the evolution of the ground state with different doping levels, we propose to perform neutron powder diffraction experiments on the samples with x = 0.4, 0.5 and 0.6 using the D2B diffractometer.
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GUO Hanjie; FERNANDEZ DIAZ Maria Teresa and KOMAREK Alexander Christoph. (2016). Magnetic ordering in LaCo1-xRhxO3 (x = 0.4, 0.5 and 0.6). Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.5-31-2410
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