{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,29]],"date-time":"2026-10-29T12:33:34Z","timestamp":1793277214596,"version":"4.5.0"},"reference-count":27,"publisher":"IOP Publishing","issue":"42","license":[{"start":{"date-parts":[[2026,10,23]],"date-time":"2026-10-23T00:00:00Z","timestamp":1792713600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/publishingsupport.iopscience.iop.org\/iop-standard\/v1"},{"start":{"date-parts":[[2026,10,23]],"date-time":"2026-10-23T00:00:00Z","timestamp":1792713600000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/iopscience.iop.org\/info\/page\/text-and-data-mining"}],"funder":[{"name":"ANR","award":["ANR-23-EXES-0001"],"award-info":[{"award-number":["ANR-23-EXES-0001"]}]},{"name":"DST SERB","award":["CRG\/2022\/006155"],"award-info":[{"award-number":["CRG\/2022\/006155"]}]},{"name":"Universit\u00e9 of Caen"},{"name":"Ministry of Science and Technology, Government of India","id":[{"id":"https:\/\/ror.org\/036h6g940","id-type":"ROR","asserted-by":"crossref"}]},{"name":"Council of Scientific and Industrial Research","id":[{"id":"https:\/\/ror.org\/021wm7p51","id-type":"ROR","asserted-by":"crossref"}]},{"name":"French government"},{"name":"Normandy region","id":[{"id":"https:\/\/ror.org\/03cq89j92","id-type":"ROR","asserted-by":"crossref"}]},{"name":"UGC-DAE CSR","award":["CRS\/202122\/01\/383"],"award-info":[{"award-number":["CRS\/202122\/01\/383"]}]},{"name":"Ministry of Education, India","id":[{"id":"https:\/\/ror.org\/019msfj37","id-type":"ROR","asserted-by":"crossref"}]}],"content-domain":{"domain":["iopscience.iop.org"],"crossmark-restriction":false},"short-container-title":["J. Phys.: Condens. Matter"],"published-print":{"date-parts":[[2026,10,23]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>\n                    Observation and interpretation of the temperature dependence of the prominent Raman modes of Mn\n                    <jats:inline-formula>\n                      <jats:tex-math>\n                        \n                      <\/jats:tex-math>\n                      <mml:math xmlns:mml=\"http:\/\/www.w3.org\/1998\/Math\/MathML\" overflow=\"scroll\">\n                        <mml:mrow>\n                          <mml:msub>\n                            <mml:mn\/>\n                            <mml:mn>3<\/mml:mn>\n                          <\/mml:msub>\n                        <\/mml:mrow>\n                      <\/mml:math>\n                    <\/jats:inline-formula>\n                    NiTa\n                    <jats:inline-formula>\n                      <jats:tex-math>\n                        \n                      <\/jats:tex-math>\n                      <mml:math xmlns:mml=\"http:\/\/www.w3.org\/1998\/Math\/MathML\" overflow=\"scroll\">\n                        <mml:mrow>\n                          <mml:msub>\n                            <mml:mn\/>\n                            <mml:mn>2<\/mml:mn>\n                          <\/mml:msub>\n                        <\/mml:mrow>\n                      <\/mml:math>\n                    <\/jats:inline-formula>\n                    O\n                    <jats:inline-formula>\n                      <jats:tex-math>\n                        \n                      <\/jats:tex-math>\n                      <mml:math xmlns:mml=\"http:\/\/www.w3.org\/1998\/Math\/MathML\" overflow=\"scroll\">\n                        <mml:mrow>\n                          <mml:msub>\n                            <mml:mn\/>\n                            <mml:mn>9<\/mml:mn>\n                          <\/mml:msub>\n                        <\/mml:mrow>\n                      <\/mml:math>\n                    <\/jats:inline-formula>\n                    (MNTO) from\n                    <jats:inline-formula>\n                      <jats:tex-math>\n                        \n                      <\/jats:tex-math>\n                      <mml:math xmlns:mml=\"http:\/\/www.w3.org\/1998\/Math\/MathML\" overflow=\"scroll\">\n                        <mml:mrow>\n                          <mml:mi>T<\/mml:mi>\n                        <\/mml:mrow>\n                      <\/mml:math>\n                    <\/jats:inline-formula>\n                    = 8 to 300 K is reported and compared with those reported in the isostructural Mn\n                    <jats:inline-formula>\n                      <jats:tex-math>\n                        \n                      <\/jats:tex-math>\n                      <mml:math xmlns:mml=\"http:\/\/www.w3.org\/1998\/Math\/MathML\" overflow=\"scroll\">\n                        <mml:mrow>\n                          <mml:msub>\n                            <mml:mn\/>\n                            <mml:mn>4<\/mml:mn>\n                          <\/mml:msub>\n                        <\/mml:mrow>\n                      <\/mml:math>\n                    <\/jats:inline-formula>\n                    Ta\n                    <jats:inline-formula>\n                      <jats:tex-math>\n                        \n                      <\/jats:tex-math>\n                      <mml:math xmlns:mml=\"http:\/\/www.w3.org\/1998\/Math\/MathML\" overflow=\"scroll\">\n                        <mml:mrow>\n                          <mml:msub>\n                            <mml:mn\/>\n                            <mml:mn>2<\/mml:mn>\n                          <\/mml:msub>\n                        <\/mml:mrow>\n                      <\/mml:math>\n                    <\/jats:inline-formula>\n                    O\n                    <jats:inline-formula>\n                      <jats:tex-math>\n                        \n                      <\/jats:tex-math>\n                      <mml:math xmlns:mml=\"http:\/\/www.w3.org\/1998\/Math\/MathML\" overflow=\"scroll\">\n                        <mml:mrow>\n                          <mml:msub>\n                            <mml:mn\/>\n                            <mml:mn>9<\/mml:mn>\n                          <\/mml:msub>\n                        <\/mml:mrow>\n                      <\/mml:math>\n                    <\/jats:inline-formula>\n                    (MTO) with honeycomb lattice and trigonal symmetry. The systematic blue shift of all Raman modes of MNTO relative to those in MTO is interpreted to result from the reduced lattice parameters of MNTO due to Ni substitution. The smaller magnetic moment of Ni\n                    <jats:inline-formula>\n                      <jats:tex-math>\n                        \n                      <\/jats:tex-math>\n                      <mml:math xmlns:mml=\"http:\/\/www.w3.org\/1998\/Math\/MathML\" overflow=\"scroll\">\n                        <mml:mrow>\n                          <mml:msup>\n                            <mml:mrow\/>\n                            <mml:mrow>\n                              <mml:mn>2<\/mml:mn>\n                              <mml:mo>+<\/mml:mo>\n                            <\/mml:mrow>\n                          <\/mml:msup>\n                        <\/mml:mrow>\n                      <\/mml:math>\n                    <\/jats:inline-formula>\n                    relative to that of Mn\n                    <jats:inline-formula>\n                      <jats:tex-math>\n                        \n                      <\/jats:tex-math>\n                      <mml:math xmlns:mml=\"http:\/\/www.w3.org\/1998\/Math\/MathML\" overflow=\"scroll\">\n                        <mml:mrow>\n                          <mml:msup>\n                            <mml:mrow\/>\n                            <mml:mrow>\n                              <mml:mn>2<\/mml:mn>\n                              <mml:mo>+<\/mml:mo>\n                            <\/mml:mrow>\n                          <\/mml:msup>\n                        <\/mml:mrow>\n                      <\/mml:math>\n                    <\/jats:inline-formula>\n                    is the likely source of a few\n                    <jats:inline-formula>\n                      <jats:tex-math>\n                        \n                      <\/jats:tex-math>\n                      <mml:math xmlns:mml=\"http:\/\/www.w3.org\/1998\/Math\/MathML\" overflow=\"scroll\">\n                        <mml:mrow>\n                          <mml:mi mathvariant=\"normal\">%<\/mml:mi>\n                        <\/mml:mrow>\n                      <\/mml:math>\n                    <\/jats:inline-formula>\n                    reduction in the observed magnetic transitions (\n                    <jats:inline-formula>\n                      <jats:tex-math>\n                        \n                      <\/jats:tex-math>\n                      <mml:math xmlns:mml=\"http:\/\/www.w3.org\/1998\/Math\/MathML\" overflow=\"scroll\">\n                        <mml:mrow>\n                          <mml:msub>\n                            <mml:mi>T<\/mml:mi>\n                            <mml:mi>N<\/mml:mi>\n                          <\/mml:msub>\n                          <mml:mstyle scriptlevel=\"0\"\/>\n                          <mml:mo>\u223c<\/mml:mo>\n                        <\/mml:mrow>\n                      <\/mml:math>\n                    <\/jats:inline-formula>\n                    97 K and\n                    <jats:inline-formula>\n                      <jats:tex-math>\n                        \n                      <\/jats:tex-math>\n                      <mml:math xmlns:mml=\"http:\/\/www.w3.org\/1998\/Math\/MathML\" overflow=\"scroll\">\n                        <mml:mrow>\n                          <mml:msub>\n                            <mml:mi>T<\/mml:mi>\n                            <mml:mi>S<\/mml:mi>\n                          <\/mml:msub>\n                          <mml:mstyle scriptlevel=\"0\"\/>\n                          <mml:mo>\u223c<\/mml:mo>\n                        <\/mml:mrow>\n                      <\/mml:math>\n                    <\/jats:inline-formula>\n                    46 K) of MNTO. The phonon frequencies (\n                    <jats:inline-formula>\n                      <jats:tex-math>\n                        \n                      <\/jats:tex-math>\n                      <mml:math xmlns:mml=\"http:\/\/www.w3.org\/1998\/Math\/MathML\" overflow=\"scroll\">\n                        <mml:mrow>\n                          <mml:mi>\u03c9<\/mml:mi>\n                        <\/mml:mrow>\n                      <\/mml:math>\n                    <\/jats:inline-formula>\n                    ) and linewidths (\n                    <jats:inline-formula>\n                      <jats:tex-math>\n                        \n                      <\/jats:tex-math>\n                      <mml:math xmlns:mml=\"http:\/\/www.w3.org\/1998\/Math\/MathML\" overflow=\"scroll\">\n                        <mml:mrow>\n                          <mml:mi mathvariant=\"normal\">\u0393<\/mml:mi>\n                        <\/mml:mrow>\n                      <\/mml:math>\n                    <\/jats:inline-formula>\n                    ) were obtained by fitting each Raman mode with a single Lorentzian profile. For\n                    <jats:inline-formula>\n                      <jats:tex-math>\n                        \n                      <\/jats:tex-math>\n                      <mml:math xmlns:mml=\"http:\/\/www.w3.org\/1998\/Math\/MathML\" overflow=\"scroll\">\n                        <mml:mrow>\n                          <mml:mi>T<\/mml:mi>\n                          <mml:mstyle scriptlevel=\"0\"\/>\n                          <mml:mo>&gt;<\/mml:mo>\n                          <mml:mstyle scriptlevel=\"0\"\/>\n                          <mml:msub>\n                            <mml:mi>T<\/mml:mi>\n                            <mml:mi>N<\/mml:mi>\n                          <\/mml:msub>\n                        <\/mml:mrow>\n                      <\/mml:math>\n                    <\/jats:inline-formula>\n                    , the phonon frequencies decrease monotonically while the linewidths broaden with increasing temperatures, these results are well described by a three-phonon anharmonic decay model. With decreasing temperatures below\n                    <jats:inline-formula>\n                      <jats:tex-math>\n                        \n                      <\/jats:tex-math>\n                      <mml:math xmlns:mml=\"http:\/\/www.w3.org\/1998\/Math\/MathML\" overflow=\"scroll\">\n                        <mml:mrow>\n                          <mml:msub>\n                            <mml:mi>T<\/mml:mi>\n                            <mml:mi>N<\/mml:mi>\n                          <\/mml:msub>\n                        <\/mml:mrow>\n                      <\/mml:math>\n                    <\/jats:inline-formula>\n                    , pronounced softening of nearly all Raman modes in MNTO is observed, becoming particularly significant below\n                    <jats:inline-formula>\n                      <jats:tex-math>\n                        \n                      <\/jats:tex-math>\n                      <mml:math xmlns:mml=\"http:\/\/www.w3.org\/1998\/Math\/MathML\" overflow=\"scroll\">\n                        <mml:mrow>\n                          <mml:msub>\n                            <mml:mi>T<\/mml:mi>\n                            <mml:mi>S<\/mml:mi>\n                          <\/mml:msub>\n                        <\/mml:mrow>\n                      <\/mml:math>\n                    <\/jats:inline-formula>\n                    in contrast to MTO, where phonon hardening was reported. These anomalous phonon shifts are attributed to strong spin-phonon coupling (\n                    <jats:inline-formula>\n                      <jats:tex-math>\n                        \n                      <\/jats:tex-math>\n                      <mml:math xmlns:mml=\"http:\/\/www.w3.org\/1998\/Math\/MathML\" overflow=\"scroll\">\n                        <mml:mrow>\n                          <mml:mi>\u03bb<\/mml:mi>\n                        <\/mml:mrow>\n                      <\/mml:math>\n                    <\/jats:inline-formula>\n                    ), which is positive in MNTO but negative in MTO. The reversal in the sign of\n                    <jats:inline-formula>\n                      <jats:tex-math>\n                        \n                      <\/jats:tex-math>\n                      <mml:math xmlns:mml=\"http:\/\/www.w3.org\/1998\/Math\/MathML\" overflow=\"scroll\">\n                        <mml:mrow>\n                          <mml:mi>\u03bb<\/mml:mi>\n                        <\/mml:mrow>\n                      <\/mml:math>\n                    <\/jats:inline-formula>\n                    in MNTO highlights a fundamental modification of the spin-lattice interaction induced by Ni substitution demonstrating that subtle structural changes can profoundly alter the coupling between lattice vibrations and magnetic order in the honeycomb magnetoelectric tantalates.\n                  <\/jats:p>","DOI":"10.1088\/1361-648x\/aeb059","type":"journal-article","created":{"date-parts":[[2026,10,5]],"date-time":"2026-10-05T22:51:06Z","timestamp":1791240666000},"page":"425401","update-policy":"https:\/\/doi.org\/10.1088\/crossmark-policy","source":"Crossref","is-referenced-by-count":0,"title":["Unveiling robust spin-phonon coupling and magnetic-order-driven phonon softening in honeycomb Mn\n                    <sub>3<\/sub>\n                    NiTa\n                    <sub>2<\/sub>\n                    O\n                    <sub>9<\/sub>"],"prefix":"10.1088","volume":"38","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-9326-6323","authenticated-orcid":true,"given":"H","family":"Singh","sequence":"first","affiliation":[{"name":"Indian Institute of Technology"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0006-7167-6536","authenticated-orcid":false,"given":"A","family":"Vishwakarma","sequence":"additional","affiliation":[{"name":"Indian Institute of Technology"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6907-9584","authenticated-orcid":false,"given":"M S","family":"Seehra","sequence":"additional","affiliation":[{"name":"West Virginia University"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7743-8321","authenticated-orcid":true,"given":"V","family":"Sathe","sequence":"additional","affiliation":[{"name":"UGC DAE Consortium for Scientific Research"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1492-2837","authenticated-orcid":true,"given":"W","family":"Prellier","sequence":"additional","affiliation":[{"name":"Universit\u00e9 de Caen, Normandie Universit\u00e9"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0740-2195","authenticated-orcid":true,"given":"S","family":"Thota","sequence":"additional","affiliation":[{"name":"Indian Institute of Technology"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"266","published-online":{"date-parts":[[2026,10,23]]},"reference":[{"key":"cmaeb059bib1","doi-asserted-by":"publisher","DOI":"10.1088\/1367-2630\/ac7cbe","type":"journal-article","article-title":"Spin dynamics, critical scattering and magnetoelectric coupling mechanism of Mn 4Nb 2O 9","volume":"24","author":"Deng","year":"2022","journal-title":"New J. 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