Rock salt-type HoO epitaxial thin film as a heavy rare-earth monoxide ferromagnetic semiconductor with a Curie temperature above 130 K-Reference-Cited by-同舟云学术

Rock salt-type HoO epitaxial thin film as a heavy rare-earth monoxide ferromagnetic semiconductor with a Curie temperature above 130 K

Published:2022-02-21 Issue:8 Volume:120 Page:082403
ISSN:0003-6951
Container-title:Applied Physics Letters
language:en
Short-container-title:Appl. Phys. Lett.

Author:

Amrillah Tahta¹,Oka Daichi²^ORCID,Shimizu Hirokazu²^ORCID,Sasaki Satoshi²,Saito Daichi²,Kaminaga Kenichi¹³,Fukumura Tomoteru¹²⁴⁵^ORCID

Affiliation:

1. Advanced Institute for Materials Research (WPI-AIMR) and Core Research Cluster, Tohoku University, Sendai 980-8577, Japan

2. Department of Chemistry, Graduate School of Science, Tohoku University, Sendai 980-8578, Japan

3. Department of Applied Chemistry, School of Engineering, Tohoku University, Sendai 980-8579, Japan

4. Center for Science and Innovation in Spintronics, Organization for Advanced Studies, Tohoku University, Sendai 980-8577, Japan

5. Center for Spintronics Research Network, Tohoku University, Sendai 980-8577, Japan

Abstract

Ho monopnictides (Ho Pn: Pn = N, P, As, Sb, and Bi) and monochalcogenides (Ho Ch: Ch = S, Se, and Te) are known to possess a nontrivial magnetic structure, while solid-phase HoO has not been synthesized yet. In this study, a rock salt-type HoO epitaxial thin film was grown by using the pulsed laser deposition method, which had a bandgap of 0.11 eV and tunable electrical conduction via its oxygen nonstoichiometry. Its Curie temperature, above 130 K, was much higher than those of Ho Pn and Ho Ch, most likely due to an enhanced direct exchange interaction. Similar to Ho Pn and Ho Ch, a HoO thin film showed a metamagnetic behavior below the Curie temperature in spite of its dominant ferromagentic ordering.

Funder

Japan Society for the Promotion of Science

Publisher

AIP Publishing

Subject

Physics and Astronomy (miscellaneous)

Link

https://aip.scitation.org/doi/pdf/10.1063/5.0081040

Reference37 articles.

1. Exchange interactions in rare earth compounds

2. Physical Properties of Some Stoichiometric Rare Earth Nitride Single Crystals

3. Intrinsic reduction of the ordered4fmagnetic moments in semiconducting rare-earth nitride thin films: DyN, ErN, and HoN