eprintid: 4499
rev_number: 21
eprint_status: archive
userid: 438
dir: disk0/00/00/44/99
datestamp: 2021-06-21 07:06:12
lastmod: 2021-06-21 07:06:12
status_changed: 2021-06-21 07:06:12
type: article
metadata_visibility: show
creators_name: Pham, Duc Thang
creators_name: Nguyen, Dang Co
creators_name: Nguyen, Thi Minh Hong
creators_name: Ho, Thi Anh
creators_id: pdthang@vnu.edu.vn
creators_id: cond@vnu.edu.vn
creators_id: hongntm@vnu.edu.vn
creators_id: anhht@vnu.edu.vn
title: Electronic structure and multiferroic properties of (Y, Mn)-doped barium hexaferrite compounds
ispublished: pub
subjects: Phys
subjects: isi
divisions: fac_physic
abstract: We have systematically studied the crystal and electronic structures and the magnetic and electrical polarization properties of polycrystalline Ba0.95Y0.05Fe12−xMnxO19 (denoted as BaYFe12−xMnxO19) compounds with x = 0–2. The analyzes of X-ray diffraction patterns and Raman scattering spectra indicated their single phase in the M-type hexaferrite structure. With increasing x, the lattice constant a slightly increased while c decreased, which related to the Jahn-Teller effect. Though an increase of x reduced gradually magnetization in a range of 23–32 emu/g, the coercive force increased from 3.3 kOe for x = 0 to about 4 kOe for x = 0.5–2. The study of the electrical polarization properties proved the dependence of the shape of electric hysteresis loops on x and applied electric field. The samples with x = 0 and 0.5 exhibit a weak ferroelectricity with the maximum polarization of ~0.11 μC/cm2 for x = 0, and of ~0.06 μC/cm2 for x = 0.5. Meanwhile, the other samples showed nearly circular hysteresis loops, which are characteristic of conductive materials. Detailed investigations indicated an increase in leakage current when x increased. All of such phenomena are tightly related to the chemical shift of Mn2+ → Mn3+ and the replacement of Mn2+,3+ for Fe3+ in BaYFe12−xMnxO19. These oxidation states and the chemical shift of Mn have been confirmed upon analyzing X-ray absorption spectra
date: 2021-01-16
date_type: published
publisher: Elsevier B.V
official_url: https://doi.org/10.1016/j.jallcom.2021.158794
id_number: 10.1016/j.jallcom.2021.158794
full_text_status: restricted
publication: Journal of Alloys and Compounds
volume: 867
number: 158794
refereed: TRUE
issn: 0925-8388
related_url_url: https://doi.org/10.1016/j.jallcom.2021.158794
related_url_type: pub
funders: Vietnam National Foundation for Science and Technology Development (NAFOSTED) under grant number 103.02-2018.357
funders: he Korea government’s Ministry of Science and ICT (MSIT, NRF- 2017R1A2B4010490 and 2020R1A2B5B01002184).
citation:   Pham, Duc Thang and Nguyen, Dang Co and Nguyen, Thi Minh Hong and Ho, Thi Anh  (2021) Electronic structure and multiferroic properties of (Y, Mn)-doped barium hexaferrite compounds.  Journal of Alloys and Compounds, 867  (158794).    ISSN 0925-8388     
document_url: https://eprints.uet.vnu.edu.vn/eprints/id/eprint/4499/3/2021_Journal%20of%20Alloys%20and%20Compounds.pdf