Bashkirov, L. A.

Kandidatova, I. N.

Lobanovskiy, L. S.

Pershukevich, P. P.

Trukhanov, S. V.

BSU Digital Library

 40 
Synthesis and properties of TbxLa1-xInO3 (x ≤ 0.15) indates  
I. N. Kandidatova1, L. A. Bashkirov1, P. P. Pershukevich2, S. V. Trukhanov3, L. S. Lobanovskiy3 
1Belarusian State Technological University, Minsk, Belarus  
2Institute of Physics of NAS of Belarus, Minsk, Belarus  
3SSPA “Scientific and Practical Materials Research Centre of NAS of Belarus”, Minsk, Belarus, 
e-mail: kin1988@mail.ru 
In present work TbхLa1–xInO3 solid solutions with x = 0.03, 0.05, 0.07, 0.15 were synthe-
sized by the ceramic method and their crystal structure, thermal expansion and thermal stability, 
magnetic susceptibility, IR-spectra, excitation and photoluminescence spectra were investigated. 
It was found that in TbInO3 – LaInO3 binary system with x ≤ 0.15 there was a continuous 
range of TbхLa1–xInO3 solid solutions with the structure of orthorhombically distorted perovskite.  
IR-spectra of the samples investigated were found to be almost coequal. 
Average coefficients of linear thermal expansion for the ceramic samples of TbхLa1–xInO3 
solid solutions depend insignificantly on the substitution degree of Tb3+ ions by La3+ ions and 
vary without certain dependence from 8.11 · 10–6 K–1, to 10.53 · 10–6 K–1. When heating TbхLa1–
xInO3 samples up to 1273 K no thermal effects were observed, total weight loss varied from 
0.1325 to 0.3254 wt. % without a certain dependence on substitution degree x  
It was found that significant magnetic dilution of paramagnetic Tb3+ ions by diamagnetic 
La3+ ions leads to a decrease in effective spin-orbital magnetic moment of Tb3+ ions. This could 
be explained by an increase in «partial freezing» of orbital magnetic by crystal field of ortho-
rhombically distorted perovskite. 
It was found that Tb0,07La0,93InO3 and Tb0,15La0,85InO3 samples possess the highest photolu-
minescence intensity among all the TbхLa1–xInO3 solid solutions investigated (unlike it had been 
stated in [1]) and so they are established to be effective phosphors with visible green emission, 
hence, prospective for white LEDs (Fig.).  
        
 
Fig. Excitation (a) and emission (b) spectra of TbхLa1–xInO3 solid solutions with x = 0.05, 0.07, 0.15 
 
References 
1. X. Liu, J. Lin Solid State Science (2009) 2030. 
 
 


Synthesis and properties of TbxLa1-xInO3 (x ≤ 0.15) indates

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Synthesis and properties of TbxLa1-xInO3 (x ≤ 0.15) indates

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