Giant Piezomagnetism in Mn3NiN

David Boldrin, Andrei P. Mihai, Bin Zou, Jan Zemen, Ryan Thompson, Ecaterina Ware, Bogdan V. Neamtu, Luis Ghivelder, Bryan Esser, David W. McComb, Peter Petrov, Lesley F. Cohen

Research output: Contribution to journalArticleResearchpeer-review

17 Citations (Scopus)

Abstract

Controlling magnetism with electric field directly or through strain-driven piezoelectric coupling remains a key goal of spintronics. Here, we demonstrate that giant piezomagnetism, a linear magneto-mechanic coupling effect, is manifest in antiperovskite Mn3NiN, facilitated by its geometrically frustrated antiferromagnetism opening the possibility of new memory device concepts. Films of Mn3NiN with intrinsic biaxial strains of ±0.25% result in Néel transition shifts up to 60 K and magnetization changes consistent with theory. Films grown on BaTiO3 display a striking magnetization jump in response to uniaxial strain from the intrinsic BaTiO3 structural transition, with an inferred 44% strain coupling efficiency and a magnetoelectric coefficient α (where α = dB/dE) of 0.018 G cm/V. The latter agrees with the 1000-fold increase over Cr2O3 predicted by theory. Overall, our observations pave the way for further research into the broader family of Mn-based antiperovskites where yet larger piezomagnetic effects are predicted to occur at room temperature.

Original languageEnglish
Pages (from-to)18863-18868
Number of pages6
JournalACS Applied Materials & Interfaces
Volume10
Issue number22
DOIs
Publication statusPublished - 2018
Externally publishedYes

Keywords

  • antiferromagnet
  • antiperovskite
  • nonvolatile memory
  • piezomagnetism
  • spintronics

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