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Title: Using methodical compositional tuning to optimize Co x Tb1− x structural and magnetic properties

Journal Article · · Applied Physics Letters
DOI:https://doi.org/10.1063/5.0049224· OSTI ID:1784585

The Co-rich end of the Co–Tb binary phase diagram (CoxTb1−x, x = 0.66–0.82) has been investigated to understand the phases which form in the bulk and how they interact to yield magnetic behavior which has been reported to be ideal for use in spintronic devices. This work shows that the phases and phase fractions present across this composition range follow those predicted by the binary phase diagram, and all compounds in this composition range are multiphase. Magnetic measurements show similar behavior in this composition range to related thin film work, and we attribute the observed behavior to the respective binary phases present in each compound. Ideal magnetic behavior of minimized magnetic saturation and maximized coercivity is observed in the range of x=0.78−0.80 related to the majority phase Co7Tb2 in these two compounds. High pressure magnetic measurements show magnetic saturation and coercivity at 300 K change little with respect to external pressure. The extension of the synthesis of these binaries into the bulk allows for specific binary phases to be targeted and analyzed for consideration in future devices.

Sponsoring Organization:
USDOE
Grant/Contract Number:
AC02- 06CH11357; SC0021344
OSTI ID:
1784585
Journal Information:
Applied Physics Letters, Journal Name: Applied Physics Letters Vol. 118 Journal Issue: 21; ISSN 0003-6951
Publisher:
American Institute of PhysicsCopyright Statement
Country of Publication:
United States
Language:
English

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