(La0.4Ba0.4Ca0.2)(Mn0.4Ti 0.6)O3: A new titano-manganate with a high dielectric constant and antiferromagnetic interactions

Pika Jha; Sarita Rai; Kandalam V. Ramanujachary; Samuel E. Lofland; Ashok K. Ganguli

doi:10.1016/j.jssc.2004.05.009

(La_0.4Ba_0.4Ca_0.2)(Mn_0.4Ti _0.6)O₃: A new titano-manganate with a high dielectric constant and antiferromagnetic interactions

Pika Jha, Sarita Rai, Kandalam V. Ramanujachary, Samuel E. Lofland, Ashok K. Ganguli

Research output: Contribution to journal › Article › peer-review

18 Scopus citations

Abstract

A new perovskite-based titano-manganate, (La_0.4Ba _0.4Ca_0.2)(Mn_0.4Ti_0.6)O₃, has been prepared by the ceramic route at 1100°C. This oxide was found to possess the cubic perovskite structure with 'a'=3.9477(23)Å (space group Pm3̄m). The refined composition as obtained by Rietveld analysis of powder X-ray data was found to be (La_0.44Ba_0.38Ca _0.18)(Mn_0.43Ti_0.57)O_2.91(3) (R _p=0.0704, wR_p=0.0828). The composition was also ascertained by Energy dispersive X-ray analysis. Iodometric studies led to a slightly higher oxygen content (compared to Rietveld refinement) corresponding to an average manganese oxidation state of 3.05. The above oxide was found to exhibit high dielectric constant (ε) of 6980 at 1kHz decreasing to 590 at 100kHz. At high temperatures (200°C) it shows an unusually high dielectric constant of 20,000 at 1kHz. In addition to the dielectric properties, detailed magnetic studies show evidence of long-range antiferromagnetic interactions near 5K. The presence of unusually high dielectric constant coupled with the long-range magnetic interactions may open up interesting applications.

Original language	English (US)
Pages (from-to)	2881-2888
Number of pages	8
Journal	Journal of Solid State Chemistry
Volume	177
Issue number	8
DOIs	https://doi.org/10.1016/j.jssc.2004.05.009
State	Published - Aug 2004

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Condensed Matter Physics
Physical and Theoretical Chemistry
Inorganic Chemistry
Materials Chemistry

Access to Document

10.1016/j.jssc.2004.05.009

Cite this

@article{8a8e49dfd4d044709ba312af3c4d0990,

title = "(La0.4Ba0.4Ca0.2)(Mn0.4Ti 0.6)O3: A new titano-manganate with a high dielectric constant and antiferromagnetic interactions",

abstract = "A new perovskite-based titano-manganate, (La0.4Ba 0.4Ca0.2)(Mn0.4Ti0.6)O3, has been prepared by the ceramic route at 1100°C. This oxide was found to possess the cubic perovskite structure with 'a'=3.9477(23){\AA} (space group Pm{\=3}m). The refined composition as obtained by Rietveld analysis of powder X-ray data was found to be (La0.44Ba0.38Ca 0.18)(Mn0.43Ti0.57)O2.91(3) (R p=0.0704, wRp=0.0828). The composition was also ascertained by Energy dispersive X-ray analysis. Iodometric studies led to a slightly higher oxygen content (compared to Rietveld refinement) corresponding to an average manganese oxidation state of 3.05. The above oxide was found to exhibit high dielectric constant (ε) of 6980 at 1kHz decreasing to 590 at 100kHz. At high temperatures (200°C) it shows an unusually high dielectric constant of 20,000 at 1kHz. In addition to the dielectric properties, detailed magnetic studies show evidence of long-range antiferromagnetic interactions near 5K. The presence of unusually high dielectric constant coupled with the long-range magnetic interactions may open up interesting applications.",

author = "Pika Jha and Sarita Rai and Ramanujachary, {Kandalam V.} and Lofland, {Samuel E.} and Ganguli, {Ashok K.}",

year = "2004",

month = aug,

doi = "10.1016/j.jssc.2004.05.009",

language = "English (US)",

volume = "177",

pages = "2881--2888",

journal = "Journal of Solid State Chemistry",

issn = "0022-4596",

publisher = "Academic Press Inc.",

number = "8",

}

TY - JOUR

T1 - (La0.4Ba0.4Ca0.2)(Mn0.4Ti 0.6)O3

T2 - A new titano-manganate with a high dielectric constant and antiferromagnetic interactions

AU - Jha, Pika

AU - Rai, Sarita

AU - Ramanujachary, Kandalam V.

AU - Lofland, Samuel E.

AU - Ganguli, Ashok K.

PY - 2004/8

Y1 - 2004/8

N2 - A new perovskite-based titano-manganate, (La0.4Ba 0.4Ca0.2)(Mn0.4Ti0.6)O3, has been prepared by the ceramic route at 1100°C. This oxide was found to possess the cubic perovskite structure with 'a'=3.9477(23)Å (space group Pm3̄m). The refined composition as obtained by Rietveld analysis of powder X-ray data was found to be (La0.44Ba0.38Ca 0.18)(Mn0.43Ti0.57)O2.91(3) (R p=0.0704, wRp=0.0828). The composition was also ascertained by Energy dispersive X-ray analysis. Iodometric studies led to a slightly higher oxygen content (compared to Rietveld refinement) corresponding to an average manganese oxidation state of 3.05. The above oxide was found to exhibit high dielectric constant (ε) of 6980 at 1kHz decreasing to 590 at 100kHz. At high temperatures (200°C) it shows an unusually high dielectric constant of 20,000 at 1kHz. In addition to the dielectric properties, detailed magnetic studies show evidence of long-range antiferromagnetic interactions near 5K. The presence of unusually high dielectric constant coupled with the long-range magnetic interactions may open up interesting applications.

AB - A new perovskite-based titano-manganate, (La0.4Ba 0.4Ca0.2)(Mn0.4Ti0.6)O3, has been prepared by the ceramic route at 1100°C. This oxide was found to possess the cubic perovskite structure with 'a'=3.9477(23)Å (space group Pm3̄m). The refined composition as obtained by Rietveld analysis of powder X-ray data was found to be (La0.44Ba0.38Ca 0.18)(Mn0.43Ti0.57)O2.91(3) (R p=0.0704, wRp=0.0828). The composition was also ascertained by Energy dispersive X-ray analysis. Iodometric studies led to a slightly higher oxygen content (compared to Rietveld refinement) corresponding to an average manganese oxidation state of 3.05. The above oxide was found to exhibit high dielectric constant (ε) of 6980 at 1kHz decreasing to 590 at 100kHz. At high temperatures (200°C) it shows an unusually high dielectric constant of 20,000 at 1kHz. In addition to the dielectric properties, detailed magnetic studies show evidence of long-range antiferromagnetic interactions near 5K. The presence of unusually high dielectric constant coupled with the long-range magnetic interactions may open up interesting applications.

UR - http://www.scopus.com/inward/record.url?scp=3342951922&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=3342951922&partnerID=8YFLogxK

U2 - 10.1016/j.jssc.2004.05.009

DO - 10.1016/j.jssc.2004.05.009

M3 - Article

AN - SCOPUS:3342951922

SN - 0022-4596

VL - 177

SP - 2881

EP - 2888

JO - Journal of Solid State Chemistry

JF - Journal of Solid State Chemistry

IS - 8

ER -

(La_0.4Ba_0.4Ca_0.2)(Mn_0.4Ti _0.6)O₃: A new titano-manganate with a high dielectric constant and antiferromagnetic interactions

Abstract

All Science Journal Classification (ASJC) codes

Access to Document

Other files and links

Fingerprint

Cite this