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Changes of spin dynamics in multiferroic Tb1 – x Cax MnO3
Nugroho A.A.a, Risdianab,c, Mufti N.d, Palstra T.T.M.d, Watanabe I.c, Tjia M.O.a
a Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Indonesia
b Department of Physics, Padjadjaran University, Indonesia
c Advanced Meson Science Laboratory, The Institute of Physical and Chemical Research (RIKEN), Japan
d Solid State Chemistry, Zernike Institute for Advanced Materials, Rijkuniversiteit Groningen, Netherlands
[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]We report the results of a series of μ SR measurements performed on polycrystalline and single crystalline Tb1 – x Cax MnO3, with x = 0, 0.05 and 0.1. Analysis of the data indicates that the Néel transition temperature around 40 K for the undoped sample is in agreement with the previous result obtained by susceptibility measurement. We further find a peculiar behavior related to the relaxor ferroelectric of magnetic origin for 5% Ca doping. This type of relaxor is suggested to be governed by spin fluctuations due to inhomogeneity in the spiral magnetic ordering induced by the A-site Ca doping. It is shown that the 5% Ca doping appears to induce faster reduction of spin fluctuation with decreasing temperature. Our μ SR data in applied longitudinal fields (LF) also indicate the possible occurrence of inhomogeneous internal field although a more detailed study is required for its clarification and verification. © 2008 Elsevier B.V. All rights reserved.[/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]Inhomogeneity,Internal fields,Longitudinal fields,Magnetic orderings,Multiferroic,Poly-crystalline,Relaxor,Relaxor ferroelectric,Single-crystalline,Susceptibility measurements,Transition temperatures[/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]Multiferroic,Relaxor ferroelectric[/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]The work of A.A. Nugroho is supported by RIKEN and KNAW, Dutch Royal Academy of Sciences, through the SPIN program. This work is in part supported by the NWO Breedtestrategiethe Program and Zernike Institute for Advanced Materials. Risdiana gratefully acknowledges the support by the RIKEN-Foreign Postdoctoral Researcher Program.[/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.physb.2008.11.173[/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]