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Spin glass behavior in LaCo1-xRhxO3 (x=0.4, 0.5, and 0.6)

MPG-Autoren
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Guo,  Hanjie
Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Manna,  Kaustuv
Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Komarek,  A. C.
Alexander Komarek, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Zitation

Guo, H., Manna, K., Luetkens, H., Hoelzel, M., & Komarek, A. C. (2016). Spin glass behavior in LaCo1-xRhxO3 (x=0.4, 0.5, and 0.6). Physical Review B, 94(20): 205128, pp. 1-7. doi:10.1103/PhysRevB.94.205128.


Zitierlink: https://hdl.handle.net/11858/00-001M-0000-002C-19EC-D
Zusammenfassung
We studied the magnetic ground state of Co/Rh-disordered LaCo1-xRhxO3 (x = 0.4, 0.5, and 0.6) by means of powder neutron diffraction (PND), muon spin relaxation (mu SR), ac susceptibility, isothermal magnetic relaxation, and heat capacity measurements. The dc magnetic susceptibility measurements exhibit a cusp around the freezing temperature T-f of all studied compounds. PND measurements show no indications of long-range magnetic ordering down to 4 K in all studied samples. mu SR experiments on these compounds show a peak in the muon spin relaxation rate around T-f. However, no spontaneous muon spin precession can be observed evidencing the short-range nature of the magnetic ordering. For the x = 0.5 sample ac susceptibility measurements show that T-f shifts to higher temperatures with increasing frequency and becomes suppressed by a dc biasing field. All these observations indicate that the Co/Rh-disordered LaCo1-x RhxO3 system is a spin glass for x = 0.4, 0.5, and 0.6.