000145577 001__ 145577
000145577 005__ 20241108105822.0
000145577 0247_ $$2doi$$a10.1016/j.jallcom.2024.177081
000145577 0248_ $$2sideral$$a140386
000145577 037__ $$aART-2025-140386
000145577 041__ $$aeng
000145577 100__ $$aGutiérrez-Martín, D.
000145577 245__ $$aUnveiling the magnetic structure of BaFeO3-y: Shedding light on the elusive magnetic behavior
000145577 260__ $$c2025
000145577 5060_ $$aAccess copy available to the general public$$fUnrestricted
000145577 5203_ $$aThis work provides a comprehensive examination of the structural and magnetic properties of 6H-BaFeO2.96 over a wide temperature range (10 K < T < 300 K) using neutron and synchrotron X-ray diffraction. Additionally, the local oxidation state of iron is examined using electron energy loss spectroscopy. No structural changes that could indicate a charge-order transition are observed in spite of a reported possible charge disproportionation of Fe4+ into Fe(4+δ)+ and Fe(4-δ)+ phenomenon at low temperature. According to the magnetic characterization, BaFeO2.96 orders antiferromagnetically at TN=156 K. The application of external magnetic fields strongly influences the magnetic behavior; the transition temperature shifts to lower values with the applied magnetic field and the long-range magnetic order melts with an applied field of 14 T. The magnetocaloric effect clearly shows at TN a change from negative to positive magnetic entropy. The Rietveld refinement of the neutron powder diffraction data collected at 10 K, gives a magnetic ordering with propagation vector [0, 0, ½] and three magnetically distinct sites for the Fe atoms. This magnetic structure consists of ferromagnetic Fe-sheets perpendicular to the c-axis with the magnetic moments along the [110] direction coupled both ferromagnetic and antiferromagnetically along the c-axis. The magnetic moment values of the three Fe ions are very different evidencing a delicate equilibrium of competing magnetic interactions.
000145577 536__ $$9info:eu-repo/grantAgreement/ES/MICIU/PID2020–113753RB-I00$$9info:eu-repo/grantAgreement/ES/MICIU/TED2021–129254B-C22
000145577 540__ $$9info:eu-repo/semantics/openAccess$$aby$$uhttp://creativecommons.org/licenses/by/3.0/es/
000145577 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion
000145577 700__ $$aHernando, M.
000145577 700__ $$aParras, M.
000145577 700__ $$aTorres-Pardo, A.
000145577 700__ $$aFernández-Díaz, M.T.
000145577 700__ $$aSavvin, S.
000145577 700__ $$aGonzález-Calbet, J.M.
000145577 700__ $$aRodrigues, J.E.
000145577 700__ $$aSilva Jr, R.S.
000145577 700__ $$aMartínez, J.L.
000145577 700__ $$aVarela, A.
000145577 773__ $$g1010 (2025), 177081 [12 pp.]$$pJ. alloys compd.$$tJOURNAL OF ALLOYS AND COMPOUNDS$$x0925-8388
000145577 8564_ $$s6175802$$uhttps://zaguan.unizar.es/record/145577/files/texto_completo.pdf$$yVersión publicada
000145577 8564_ $$s2559869$$uhttps://zaguan.unizar.es/record/145577/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada
000145577 909CO $$ooai:zaguan.unizar.es:145577$$particulos$$pdriver
000145577 951__ $$a2024-11-08-10:38:19
000145577 980__ $$aARTICLE