期刊
ADVANCED FUNCTIONAL MATERIALS
卷 29, 期 40, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.201902502
关键词
antiferromagnet; antiperovskite; frustration; piezomagnetism; spintronics
类别
资金
- Henry Royce Institute through the EPSRC [EP/R00661X/1]
- Leverhulme Trust [RPG-2016-306]
- Engineering and Physical Sciences Research Council [1801777, 1857799, EP/P02520X/1] Funding Source: researchfish
- EPSRC [EP/P02520X/1, EP/G004765/1] Funding Source: UKRI
Multicomponent magnetic phase diagrams are a key property of functional materials for a variety of uses, such as manipulation of magnetization for energy efficient memory, data storage, and cooling applications. Strong spin-lattice coupling extends this functionality further by allowing electric-field-control of magnetization via strain coupling with a piezoelectric. Here this work explores the magnetic phase diagram of piezomagnetic Mn3NiN thin films, with a frustrated noncollinear antiferromagnetic (AFM) structure, as a function of the growth induced biaxial strain. Under compressive strain, the films support a canted AFM state with large coercivity of the transverse anomalous Hall resistivity, rho(xy), at low temperature, that transforms at a well-defined Neel transition temperature (T-N) into a soft ferrimagnetic-like (FIM) state at high temperatures. In stark contrast, under tensile strain, the low temperature canted AFM phase transitions to a state where rho(xy) is an order of magnitude smaller and therefore consistent with a low magnetization phase. Neutron scattering confirms that the high temperature FIM-like phase of compressively strained films is magnetically ordered and the transition at T-N is first-order. The results open the field toward future exploration of electric-field-driven piezospintronic and thin film caloric cooling applications in both Mn3NiN itself and the broader Mn(3)AN family.
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