TY - JOUR

T1 - Properties of Terbium Oxide Nanoparticles Synthesized via Laser Ablation in a Reducing Medium

AU - Maksimov, R.

AU - Platonov, V.

AU - Osipov, V. V.

AU - Karagedov, G.

AU - Yurovskikh, A.

AU - Spirina, A.

AU - Shitov, V.

N1 - This work was supported by the Russian Science Foundation, grant no. 22-23-00658. https://rscf.ru/project/22-23-00658/.

PY - 2023

Y1 - 2023

N2 - This paper reports on the synthesis of terbium sesquioxide (Tb2O3) nanoparticles via laser ablation of a solid target in a flowing 95% Ar + 5% H2 binary welding mixture with the use of an ytterbium-doped fiber laser with an average output power of 300 W. We have studied morphological and structural features of the synthesized powder, its thermal behavior, magnetic properties, and densification dynamics during heating to 1450°C in vacuum. The synthesized particles were nearly spherical in shape, with an average size of 13 nm, and had a monoclinic crystal structure, which irreversibly transformed into a cubic structure of $$Ia\overline 3 $$ symmetry as a result of firing in argon or vacuum at temperatures near 750 and 1050°C, respectively. Using temperature-dependent specific magnetization measurements, we determined their paramagnetic Curie temperature (θp = –11.8 K), Curie constant (C = 11.74 K emu/(mol Oe)), and effective magnetic moment (μeff = 9.69μB/Tb). These data suggest that antiferromagnetic exchange interaction between the terbium ions prevails and that the content of Tb4+ ions in the nanopowder is negligible. We have demonstrated the feasibility of producing transparent Tb2O3 ceramics by consolidating presintered nanoparticles via hot isostatic pressing for 2 h at a temperature of 1450°C and pressure of 200 MPa. © 2023, Pleiades Publishing, Ltd.

AB - This paper reports on the synthesis of terbium sesquioxide (Tb2O3) nanoparticles via laser ablation of a solid target in a flowing 95% Ar + 5% H2 binary welding mixture with the use of an ytterbium-doped fiber laser with an average output power of 300 W. We have studied morphological and structural features of the synthesized powder, its thermal behavior, magnetic properties, and densification dynamics during heating to 1450°C in vacuum. The synthesized particles were nearly spherical in shape, with an average size of 13 nm, and had a monoclinic crystal structure, which irreversibly transformed into a cubic structure of $$Ia\overline 3 $$ symmetry as a result of firing in argon or vacuum at temperatures near 750 and 1050°C, respectively. Using temperature-dependent specific magnetization measurements, we determined their paramagnetic Curie temperature (θp = –11.8 K), Curie constant (C = 11.74 K emu/(mol Oe)), and effective magnetic moment (μeff = 9.69μB/Tb). These data suggest that antiferromagnetic exchange interaction between the terbium ions prevails and that the content of Tb4+ ions in the nanopowder is negligible. We have demonstrated the feasibility of producing transparent Tb2O3 ceramics by consolidating presintered nanoparticles via hot isostatic pressing for 2 h at a temperature of 1450°C and pressure of 200 MPa. © 2023, Pleiades Publishing, Ltd.

UR - http://www.scopus.com/inward/record.url?partnerID=8YFLogxK&scp=85171536255

UR - https://elibrary.ru/item.asp?id=54948171

UR - https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=tsmetrics&SrcApp=tsm_test&DestApp=WOS_CPL&DestLinkType=FullRecord&KeyUT=001107317000007

U2 - 10.1134/S0020168523020115

DO - 10.1134/S0020168523020115

M3 - Article

VL - 59

SP - 171

EP - 178

JO - Inorganic Materials

JF - Inorganic Materials

SN - 0020-1685

IS - 2

ER -