Room–Temperature Insulating Ferromagnetic (Ni,Co)1+2xTi1–xO3 Thin Films
Abstract
Insulating uniaxial room–temperature ferromagnets are a prerequisite for commonplace spin wave–based devices, the obstacle in contemporary ferromagnets being the coupling of ferromagnetism with large conductivity. It is shown that the uniaxial A1 + 2xTi4+1 – xO3 (ATO), A = Ni2+,Co2+, and 0.6 < x ≤ 1, thin films are electrically insulating ferromagnets already at room temperature. Here, the octahedra network of the ATO and the corundum and ilmenite structures are the same yet different octahedra–filling proved to be a route to switch from the antiferromagnetic to ferromagnetic regime. Octahedra can continuously be filled up to x = 1, or vacated (–0.24 < x < 0) in the ATO structure. TiO–layers, which separate the ferromagnetic (Ni,Co)O–layers and intermediate the antiferromagnetic coupling between the ferromagnetic layers in the NiTiO3 and CoTiO3 ilmenites, can continuously be replaced by (Ni,Co)O–layers to convert the ATO–films to ferromagnetic insulator with abundant direct cation interactions.
- Authors:
-
[1];
[2];
[2];
[2];
[2];
[3];
[2];
[2]
- Finnish Research and Engineering, Jaalaranta Helsinki (Finland)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Martin-Luther-Univ. Halle-Wittenberg, Halle (Germany)
- Publication Date:
- Research Org.:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1571845
- Grant/Contract Number:
- AC05-00OR22725
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Annalen der Physik (Leipzig)
- Additional Journal Information:
- Journal Name: Annalen der Physik (Leipzig); Journal Volume: 531; Journal Issue: 11; Journal ID: ISSN 0003-3804
- Publisher:
- Wiley
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; corundum compounds; ilmenites; insulating ferromagnet; nickel cobalt titanates; thin films
Citation Formats
Fujioka, Yukari, Frantti, Johannes, Rouleau, Christopher M., Puretzky, Alexander A., Gai, Zheng, Lavrik, Nickolay V., Herklotz, Andreas, Ivanov, Ilia N., and Meyer, III, Harry. Room–Temperature Insulating Ferromagnetic (Ni,Co)1+2xTi1–xO3 Thin Films. United States: N. p., 2019.
Web. doi:10.1002/andp.201900299.
Fujioka, Yukari, Frantti, Johannes, Rouleau, Christopher M., Puretzky, Alexander A., Gai, Zheng, Lavrik, Nickolay V., Herklotz, Andreas, Ivanov, Ilia N., & Meyer, III, Harry. Room–Temperature Insulating Ferromagnetic (Ni,Co)1+2xTi1–xO3 Thin Films. United States. https://doi.org/10.1002/andp.201900299
Fujioka, Yukari, Frantti, Johannes, Rouleau, Christopher M., Puretzky, Alexander A., Gai, Zheng, Lavrik, Nickolay V., Herklotz, Andreas, Ivanov, Ilia N., and Meyer, III, Harry. Mon .
"Room–Temperature Insulating Ferromagnetic (Ni,Co)1+2xTi1–xO3 Thin Films". United States. https://doi.org/10.1002/andp.201900299. https://www.osti.gov/servlets/purl/1571845.
@article{osti_1571845,
title = {Room–Temperature Insulating Ferromagnetic (Ni,Co)1+2xTi1–xO3 Thin Films},
author = {Fujioka, Yukari and Frantti, Johannes and Rouleau, Christopher M. and Puretzky, Alexander A. and Gai, Zheng and Lavrik, Nickolay V. and Herklotz, Andreas and Ivanov, Ilia N. and Meyer, III, Harry},
abstractNote = {Insulating uniaxial room–temperature ferromagnets are a prerequisite for commonplace spin wave–based devices, the obstacle in contemporary ferromagnets being the coupling of ferromagnetism with large conductivity. It is shown that the uniaxial A1 + 2xTi4+1 – xO3 (ATO), A = Ni2+,Co2+, and 0.6 < x ≤ 1, thin films are electrically insulating ferromagnets already at room temperature. Here, the octahedra network of the ATO and the corundum and ilmenite structures are the same yet different octahedra–filling proved to be a route to switch from the antiferromagnetic to ferromagnetic regime. Octahedra can continuously be filled up to x = 1, or vacated (–0.24 < x < 0) in the ATO structure. TiO–layers, which separate the ferromagnetic (Ni,Co)O–layers and intermediate the antiferromagnetic coupling between the ferromagnetic layers in the NiTiO3 and CoTiO3 ilmenites, can continuously be replaced by (Ni,Co)O–layers to convert the ATO–films to ferromagnetic insulator with abundant direct cation interactions.},
doi = {10.1002/andp.201900299},
journal = {Annalen der Physik (Leipzig)},
number = 11,
volume = 531,
place = {United States},
year = {Mon Sep 02 00:00:00 EDT 2019},
month = {Mon Sep 02 00:00:00 EDT 2019}
}
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