Statistics on magnetic properties of Co compounds: A database-driven method for discovering Co-based ferromagnets
Date
2022-06
Authors
Byland, Journey K.
Shi, Yunshu
Parker, David S.
Zhao, Jingtai
Ding, Shaoqing
Mata, Rogelio
Magliari, Haley E.
Palasyuk, Andriy
Bud'ko, Sergey L.
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American Physical Society
Abstract
The search for new ferromagnetic compounds is often targeted at known structure families, particularly
those containing iron, cobalt, and manganese. We propose a method to expand this search to lesser-known
structure types, using a database of experimental Curie and Néel temperatures. This study, in particular, illustrates
the case of compounds containing the element cobalt, and we demonstrate how the use of such a database
can lead to the discovery of ferromagnetic materials that had previously been overlooked. We report statistics
from a literature survey of the magnetic properties of Co-based compounds with more than 33 at. % Co. We
classify more than 13 000 compounds by structure type, cobalt content, and magnetic ground state. From these
data, compounds TaCo2Ga, La6Co13Bi, and Nd2Co3 were identified as potential ferromagnets, and we confirm
their ferromagnetic ordering theoretically via first-principles calculations and experimentally via synthesis
and characterization measurements. In addition, the analysis is focused on the collection of data trends and
discovery of ferromagnetic materials with easy-axis magnetic anisotropy. Both known ferromagnetic materials
with unknown magnetic anisotropy, and unstudied compounds were considered. From the subset of known
ferromagnets with unknown anisotropy, the compound Co2Mg was synthesized, characterized, and determined
to have easy-axis magnetic anisotropy at room temperature.
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Comments
This article is published as Byland, Journey K., Yunshu Shi, David S. Parker, Jingtai Zhao, Shaoqing Ding, Rogelio Mata, Haley E. Magliari et al. "Statistics on magnetic properties of Co compounds: A database-driven method for discovering Co-based ferromagnets." Physical Review Materials 6, no. 6 (2022): 063803.
DOI: 10.1103/PhysRevMaterials.6.063803.
Copyright 2022 American Physical Society.
Posted with permission.