Charge-order driven multiferroic and magneto-dielectric properties of rare earth manganates

Bulletin of materials science

Anirban Ghosh¹  Jyoti Ranjan Sahu²  Claudy Rayan Serrao¹ 

[1] Chemistry and Physics of Materials Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Bangalore 560 064, India$$Materials Research Centre, Indian Institute of Science, Bangalore 560 012, India$$Chemistry and Physics of Materials Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Bangalore 560 064, IndiaChemistry and Physics of Materials Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Bangalore 560 064, India$$Materials Research Centre, Indian Institute of Science, Bangalore 560 012, India$$Materials Research Centre, Indian Institute of Science, Bangalore 560 012, IndiaChemistry and Physics of Materials Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Bangalore 560 064, India$$Materials Research Centre, Indian Institute of Science, Bangalore 560 012, India$$;Chemistry and Physics of Materials Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Bangalore 560 064, India$$Chemistry and Physics of Materials Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Bangalore 560 064, IndiaChemistry and Physics of Materials Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Bangalore 560 064, India$$

关键词: Multiferroics;    magnetoelectric effect;    magnetocapacitance;    rare earth manganates.;   

DOI  :  

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

Charge-order driven magnetic ferroelectricity is shown to occur in several rare earth manganates of the general formula, Ln_{1â€�?�ð�?��?}A_ð‘�?MnO₃ (Ln = rare earth, A = alkaline earth). Charge-ordered manganates exhibit dielectric constant anomalies around the charge-ordering or the antiferromagnetic transition temperature. Magnetic fields have a marked effect on the dielectric properties of these compounds, indicating the presence of coupling between the magnetic and electrical order parameters. Magneto-dielectric properties are retained in small particles of the manganates. The observation of magneto-ferroelectricity in these manganates is in accordance with theoretical predictions.

【 授权许可】

Unknown