Effect of Pr–Ca substitution on the transport and magnetic behavior of LaMnO3 perovskite

Pramana

S Rayaprol²  D S Rana²  M S Sahasrabudhe¹  C M Thaker²  D G Kuberkar1²  Krushna Mavani²  S I Patil¹ 

[1] Department of Physics, University of Pune, Pune 411 007, India$$;Department of Physics, Saurashtra University, Rajkot 360 005, India$$

关键词: Colossal magnetoresistance (CMR);    LaMnO3 perovskite;    Pr–Ca substitution;    transport properties;    magnetic properties.;   

DOI  :  

学科分类：物理（综合）

来源: Indian Academy of Sciences

【 摘 要 】

The effect of simultaneous substitution of a fluctuating cation and a divalent cation in LaMnO3 perovskite modifies the properties of the material to exhibit large valence colossal magnetoresistance (CMR) effect. A good example of these properties is (La1-2𝑥Pr𝑥Ca𝑥)MnO3 (LPCMO) type CMR material. In this communication it is reported that, with the increase in 𝑥 (for 𝑥 = 0.1, 0.15, 0.2), the 𝑇c varies between 100 and 120 K with improvisation in metal–insulator transition. Interestingly, resistance increases with 𝑥 from few hundred ohms to few kilo ohms with corresponding decrease in the unit cell volume. The results of the studies using X-ray diffraction (XRD), electrical resistivity, magnetoresistance and ac susceptibility measurements on LPCMO samples for understanding the structural, transport and magnetic properties are discussed in detail.

【 授权许可】

Unknown