INFRARED REFLECTIVITY ANALYSIS OF Y3+ SUBSTITUTED LaMnO3

被引：0

作者：

Ahmad, J. ^{[1
]}

Abbas, H. ^{[1
,2
]}

Bukhari, S. H. ^{[3
]}

Jamil, M. T. ^{[1
]}

Nissar, U. ^{[1
]}

Khan, J. A. ^{[1
]}

Ali, S. A. ^{[1
]}

机构：

[1] Bahauddin Zakariya Univ, Dept Phys, Multan 60800, Pakistan

[2] Govt Emerson Coll, Dept Phys, Multan 60800, Pakistan

[3] Govt Coll Univ, Dept Phys, Layyah Campus, Faisalabad 31200, Layyah, Pakistan

来源：

JOURNAL OF OVONIC RESEARCH | 2018年 / 14卷 / 06期

关键词：

X-ray diffraction; FTIR; infrared reflectivity; Energy band gap; Effective Charges; TRANSPORT-PROPERTIES; CRYSTAL-STRUCTURE; EFFECTIVE CHARGES; MAGNETORESISTANCE; MAGNETOTRANSPORT;

D O I：

暂无

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Multiferroic manganite La1-xYxMnO3 (LYMO) (x=0.0, 0.2, 0.4, 0.6) have been synthesized by using sol-gel method. The powder X-ray diffraction (XRD) pattern with a Rietveld refinement analysis exhibits a transition from rhombohedral to orthrohombic for 0.4 <= x <= 0.6. A comprehensive study of infrared (IR) active phonons was carried out at room temperature in the frequency range 30-7500 cm(-1) by means of Fourier transform infrared (FTIR) spectrometer. Optical parameters i.e. resonant frequency (omega(TO(j))),, oscillator strength (S-j) and damping factor (Upsilon(j)) of observed phonons have been determined by Lorentz oscillators model fit to the measured reflectivity. The frequency shifts of optical phonons have been observed with the increase in x. The change in optical parameters of IR active phonons reflects the confirmation of phase transformation. Moreover, Born and Szigeti effective charges were calculated to understand the polarization effect and ionicity in the present multiferroic system.

引用

页码：429 / 439

页数：11

共 51 条

[1]

Ahmad J., 2017, HIND ADV COND MATT P, V8

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