2010/09/27 by S. K. Giri, Giri, S. K., T. K. Nath +1
Materials Science · Physics and Astronomy · #Advanced Thermoelectric Materials and Devices #FOS: Physical sciences #Magnetic and transport properties of perovskites and related materials #Multiferroics and related materials #Strongly Correlated Electrons (cond-mat.str-el) #cond-mat.str-el
paper · pdf · doi:10.48550/arxiv.1009.5247
20 pages,10 figures and 2 tables
openalex publication_date 2010/09/27 · arxiv created 2012/03/13 · arxiv updated 2015/03/12 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We report here the magnetic properties of electron-doped Sm1-xCaxMnO3 manganites with the doping level of x=0.91. Exchange bias effect has been observed in Sm0.09Ca0.91MnO3 nanomanagnites system and can be tuned by the strength of cooling magnetic field (Hcool). The values of exchange bias parameter i.e. exchange bias fields (HE), coercivity (HC), remanence asymmetry (ME) and magnetic coercivity (MC) are found to strongly depend on Hcool. The larger effective magnetic moments and deviation of inverse susceptibility (\chi-1) from Curie-Weiss law indicate the possible existence of Griffiths phase (GP). A rigorous measurement of linear and nonlinear ac and dc magnetic susceptibility in nanomanganites proves the existence of Griffiths phase (GP) in the temperature range TC<T<TG (Griffiths temperature). The effect of size reduction on exchange bias effect and GP is addressed here. The enhancement of exchange bias effect and GP has been argued to be due to the modification of the phase separated state on size reduction.