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The effect of the A-Site cation on the structural transformations in ABi4Ti4O15 (A= Ba, Sr): Raman scattering studies
Prasetyo A.a,b, Mihailova B.c, Suendo V.b, Nugroho A.A.b, Ismunandarb
a Department of Chemistry, Universitas Islam Negeri Maulana Malik Ibrahim, Malang, 65144, Indonesia
b Division of Inorganic and Physical Chemistry, Faculty Mathematics and Natural Sciences, Institut Teknologi Bandung, Bandung, 40132, Indonesia
c Department Geowissenschaften, Universität Hamburg, Hamburg, 20146, Germany
[vc_row][vc_column][vc_row_inner][vc_column_inner][vc_separator css=”.vc_custom_1624529070653{padding-top: 30px !important;padding-bottom: 30px !important;}”][/vc_column_inner][/vc_row_inner][vc_row_inner layout=”boxed”][vc_column_inner width=”3/4″ css=”.vc_custom_1624695412187{border-right-width: 1px !important;border-right-color: #dddddd !important;border-right-style: solid !important;border-radius: 1px !important;}”][vc_empty_space][megatron_heading title=”Abstract” size=”size-sm” text_align=”text-left”][vc_column_text]© 2019The effect of the type of A-site cation on the structural transformations of ABi4Ti4O15 (A= Ba, Sr) was studied by a comparative analysis of the Raman scattering of BaBi4Ti4O15 and SrBi4Ti4O15 in the temperature range 120–850 K. The results are also compared with those previously reported on PbBi4Ti4O15. Similar to PbBi4Ti4O15, BaBi4Ti4O15, and SrBi4Ti4O15 exhibit an additional structural transformation at Ta < Tc and Ta decreases with the increase in the ionic radius of the A-site cation. This structural alteration consists of rearrangements of the A-site cations, which for A= Ba is accompanied by readjustment of the octahedral tilting and a change in the BO6 geometry. The results presented here confirm that the development of spontaneous polarization in four-layer Aurivillius-type ferroelectrics is triggered by the rigid-layer phonon mode, i.e., vibrations of the Bi2O2 planes relative to the perovskite-like blocks, rather than by cationic vibrations only within the perovskites blocks.[/vc_column_text][vc_empty_space][vc_separator css=".vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}"][vc_empty_space][megatron_heading title="Author keywords" size="size-sm" text_align="text-left"][vc_column_text]A-site cations,ABi4Ti4O15 (A= Ba, Sr),Comparative analysis,Octahedral tilting,Spontaneous polarizations,Structural alterations,Structural transformation,Temperature dependence[/vc_column_text][vc_empty_space][vc_separator css=".vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}"][vc_empty_space][megatron_heading title="Indexed keywords" size="size-sm" text_align="text-left"][vc_column_text]ABi4Ti4O15 (A= Ba, Sr),Ionic radii of A-site cation,Raman scattering,Structural transformation,Temperature dependence[/vc_column_text][vc_empty_space][vc_separator css=".vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}"][vc_empty_space][megatron_heading title="Funding details" size="size-sm" text_align="text-left"][vc_column_text][{'$': 'This work was financially supported by the Desentralisasi Research Project 2014, The Ministry of Research Technology and Higher Education of the Republic of Indonesia and the Program Sandwich Luar Negeri (Prosale) 2014, The Ministry of Religious Affairs of the Republic of Indonesia . Thank’s to Dr. Rolan Rusli (Department of Pharmacy, Universitas Mulawarwan, Samarida, Indonesia) and Dr. Arie Hardian (Department of Chemistry, Universitas Jenderal Ahmad Yani, Cimahi, Indonesia) for XRD data refinement processing. Appendix A'}, {'$': "This work was financially supported by the Desentralisasi Research Project 2014, The Ministry of Research Technology and Higher Education of the Republic of Indonesia and the Program Sandwich Luar Negeri (Prosale) 2014, The Ministry of Religious Affairs of the Republic of Indonesia. Thank's to Dr. Rolan Rusli (Department of Pharmacy, Universitas Mulawarwan, Samarida, Indonesia) and Dr. Arie Hardian (Department of Chemistry, Universitas Jenderal Ahmad Yani, Cimahi, Indonesia) for XRD data refinement processing."}][/vc_column_text][vc_empty_space][vc_separator css=".vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}"][vc_empty_space][megatron_heading title="DOI" size="size-sm" text_align="text-left"][vc_column_text]https://doi.org/10.1016/j.jssc.2019.121131[/vc_column_text][/vc_column_inner][vc_column_inner width=”1/4″][vc_column_text]Widget Plumx[/vc_column_text][/vc_column_inner][/vc_row_inner][/vc_column][/vc_row][vc_row][vc_column][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][/vc_column][/vc_row]