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The nickel element doped holmium oxide (Ho2O3:Ni) transparent magnetooptical ceramics were fabricated by vacuum sintering and the dopant impacts on structure features and Faraday effects were investigated. The starting oxide powders were synthesized by pyrolyzing the resulting layered holmium-based hydroxide nanosheets prepared from a chemical precipitation route using the sodium hydroxide as precipitant at the freezing temperature. Upon hightemperature sintering, the Ni∙∙ defect is introduced by Ni2+ substitution for Ho3+ to form the interstitial solid solution. The 1 at.% Ni2+ doped Ho2O3 ceramic sample exhibits an in-line transmittance of ∼70.04% at 1 550 nm with a relative density of ∼99.88%, while more Ni2+ incorporation (e.g., 2‒5 at.%) even leads to a completely opaque state. The magneto-optical transparent Ho2O3:1%Ni ceramic developed in this work has Verdet constants of ∼−195, −65, and −29 rad/(T⋅m) at 635, 1 064, and 1 550 nm, respectively, which are ∼1.8-fold higher than the commercial terbium gallium garnet crystal or ∼1.4-fold higher than the pure Ho2O3 ceramic. This material also possesses relatively large figure of merit of 14.6◦/T at 1 064 nm and relatively high thermal conductivity of ∼7.5 W/(m⋅K) at room temperature.

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  This is the peer reviewed version of the following article: Nickel element doping impacts on structure features and Faraday effects of magneto-optical transparent holmium oxide ceramics, which has been published in final form at https://doi.org/10.1111/ijac.14677. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. This article may not be enhanced, enriched or otherwise transformed into a derivative work, without express permission from Wiley or by statutory rights under applicable legislation. Copyright notices must not be removed, obscured or modified. The article must be linked to Wiley’s version of record on Wiley Online Library and any embedding, framing or otherwise making available the article or pages thereof by third parties from platforms, services and websites other than Wiley Online Library must be prohibited.

Keyword: Transparent Ho2O3 ceramics, Magneto-optical property, Nickel doping, Structure, Sintering

Date published: 2024-01-09

Publisher: Wiley

Journal:

• International Journal of Applied Ceramic Technology (ISSN: 1546542X) vol. 21 issue. 3 p. 2510-2518

Funding:

Manuscript type: Author's version (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.4599

First published URL: https://doi.org/10.1111/ijac.14677

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Updated at: 2025-01-09 16:30:45 +0900

Published on MDR: 2025-01-09 16:30:45 +0900