Spin-Glass Behavior and the Magnetic Relaxation Effects in Nd_0.90Sr_0.10CoO₃

Abstract:

The magnetization, ac susceptibility and magnetic relaxation of Nd_0.90Sr_0.10CoO₃ polycrystalline sample were systematically investigated in this paper. The experimental studies of susceptibility and magnetic relaxation evidence the existence of a low-temperature spin-glass. A dynamic analysis of ac susceptibility implies a spin-glass transition temperature TSG =12.17 K and the dynamical exponent zv=8. Moreover, low-temperature zero-field cooling and field cooling magnetic relaxation show perfectly mirror symmetry, and field cooling processes relaxation obeys a stretched exponential form. Therefore, our study confirms that the phase separation in Nd_0.90Sr_0.10CoO₃ originates from both the ferromagnetic clusters interaction and the spin glasslike phase at low temperature.

• Periodical: Advanced Materials Research (Volumes 557-559)
• Pages: 680-683
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.557-559.680
• Online since: July 2012
• Authors: Yi Yun Yang
• Keywords: AC Susceptibility, Magnetic Relaxation Effects, Spin Glass

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