(La2/5Ba2/5Ca1/5)(Mn(2/5) : Rietveld studies, dielectric and magnetic properties of new perovskite-related oxides

Bulletin of materials science

Kandalam V Ramanujachary³  Ashok K Ganguli²  Samuel E Lofland¹  Pika Jha²  Saroj L Samal² 

[1] Department of Physics and Astronomy, Rowan University, 201 Mullica Hill Road, Glassboro, NJ 08028, USA$$Department of Physics and Astronomy, Rowan University, 201 Mullica Hill Road, Glassboro, NJ 08028, USADepartment of Physics and Astronomy, Rowan University, 201 Mullica Hill Road, Glassboro, NJ 08028, USA$$;Department of Chemistry, Indian Institute of Technology, Hauz Khas, New Delhi 110 016, India$$Department of Chemistry, Indian Institute of Technology, Hauz Khas, New Delhi 110 016, IndiaDepartment of Chemistry, Indian Institute of Technology, Hauz Khas, New Delhi 110 016, India$$;Department of Chemistry and Biochemistry, Rowan University, 201 Mullica Hill Road, Glassboro, NJ 08028, USA$$Department of Chemistry and Biochemistry, Rowan University, 201 Mullica Hill Road, Glassboro, NJ 08028, USADepartment of Chemistry and Biochemistry, Rowan University, 201 Mullica Hill Road, Glassboro, NJ 08028, USA$$

关键词: Oxides;    Rietveld studies;    dielectric.;   

DOI  :  

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

Oxides of the type (La_2/5Ba_2/5Ca_1/5) have been synthesized by the ceramic route. All the above oxides have been found to crystallize in the cubic perovskite structure. Rietveld refinement of the Ni-based oxide, (La_2/5Ba_2/5Ca_1/5)(Ni_2/5Ti_3/5)O₃ gave rise to a composition (La_0.44Ba_0.38Ca_0.18) (Ni_0.42Ti_0.58)O_2.85(6) and the refined lattice parameter obtained was 3.9411(2) Ã�?. A shift from antiferromagnetic to paramagnetic behaviour is observed with increase in nickel concentration, the Mn-rich phases showing antiferromagnetism around 5 K. There is a systematic decrease in the dielectric constant, and loss tangent with increase in Ni concentration .

【 授权许可】

Unknown