Inducement of Itinerant Electron Transport in Charge-Ordered Pr0.6Ca0.4MnO3 by Ba Doping

Ibrahim, Norazila; Yahya, A. K.

doi:10.1007/s10948-015-3346-5

Cited by 13 publications

(1 citation statement)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Quite recently, a number of works have been focused on mixed valence manganites of the type Ln 1-x D x MnO 3 , where Ln represents trivalent rare earth ions such as La, Pr, Nd, Eu , Y and D represents alkaline ions such as Ca, Sr, Pb, Ba due to its unique physical properties such as the observation of colossal magnetoresistance effect (CMR) and transition of metal to insulator behavior which simultaneously occur at the same temperature region of ferromagnetic to paramagnetic transition [1][2]. The CMR effect, which is a phenomena related to the change of resistivity attributed to the improvement of charge carrier spin alignment induced by external magnetic field has generated considerable interest due to its potential application such as in spintronic based technologies [1][2]. The observed physical phenomena of metal-insulator transition and the MR effect can be understood by the double exhange (DE) mechansim which involves the interaction between pairs of Mn 3+ and Mn 4+ ions as proposed by Zener [3].…”

Section: Introductionmentioning

confidence: 99%

Effect of La3+ Substitution at Bi-Site on Transport Properties of Bi0.3-xLaxPr0.3Ca0.4Mn0.1Cr0.9MnO3

Ibrahim¹,

Amaran²,

Mohamed³

et al. 2019

IJET

View full text Add to dashboard Cite

Magnetic and electronic transport properties of Bi0.3-xLaxPr0.3Ca0.4Mn0.1Cr0.9O3 (0≤x≤0.2) manganites have been investigated by measurements of AC-susceptibility, resistivity and magnetoresistance. The samples were prepared using conventional solid-state synthesis method. Magnetic susceptibility versus temperature measurements showed all samples exhibit ferromagnetic to paramagnetic transition with Curie temperature, Tc enhanced from 111 K (x=0) to 174 K (x=0.2). Electrical resistivity measurements of the samples in zero field showed increase of metal-insulator (MI) transition temperature from 58 K(x=0) to 88 K(x=0.2). The increase in both Tc and TMI indicates enhancement of double exchange (DE) interaction involving Mn3+ and Mn4+ ions as a result of weakening of the hybridization effect between Bi3+ 6s2 lone pair with O orbital due to La3+ substitution. La substitution in the Bi-based compound is suggested reduce MnO6 octahedral distortion hence increasing delocalization of charge carriers. The observed variation in MR behavior due to La substitution indicates the substitution influence the MR mechanism of extrinsic and intrinsic behavior in Bi0.3-xLaxPr0.3Ca0.4Mn0.1Cr0.9O3 .

show abstract