Imperial College London
Alternate

DrPeterPetrov

Faculty of Engineering, Department of Materials

Principal Research Scientist
 
 
 
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Contact

 

+44 (0)20 7594 8156p.petrov

 
 
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Location

 

2.03DRoyal School of MinesSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Cohen:2019:10.1002/adfm.201902502,
author = {Cohen, L and Boldrin, D and Johnson, F and Thompson, R and Mihai, AP and Zou, B and Griffiths, J and Gubeljak, P and Ormandy, KL and Manuel, P and Khalyavin, DD and Ouladdiaf, B and Petrov, P and Branford, W and Cohen, LF},
doi = {10.1002/adfm.201902502},
journal = {Advanced Functional Materials},
title = {The biaxial strain dependence of magnetic order in spin frustrated mn3nin thin films},
url = {http://dx.doi.org/10.1002/adfm.201902502},
volume = {29},
year = {2019}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Multi-component magnetic phase diagrams are a key property of functional materials for a variety of uses, such as manipulation of magnetisation for energy efficient memory, data storage and cooling applications. Strong spin-lattice coupling extends this functionality further by allowing electric-field-control of magnetisation via strain coupling with a piezoelectric . Here we explore the magnetic phase diagram of piezomagnetic Mn3NiN thin films, with a frustrated non-collinear 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, ρxy, at low temperature, that transforms at a well-defined Néel transition temperature (TN) 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 ρxy is an order of magnitude smaller and therefore consistent with a low magnetisation phase. Neutron scattering confirms that the high temperature FIM-like phase of compressively strained films is magnetically ordered and the transition at TN is 1st-order. Our results open the field towards future exploration of electric-field driven piezospintronic and thin film caloric cooling applications in both Mn3NiN itself and the broader Mn3AN family.
AU  - Cohen,L
AU  - Boldrin,D
AU  - Johnson,F
AU  - Thompson,R
AU  - Mihai,AP
AU  - Zou,B
AU  - Griffiths,J
AU  - Gubeljak,P
AU  - Ormandy,KL
AU  - Manuel,P
AU  - Khalyavin,DD
AU  - Ouladdiaf,B
AU  - Petrov,P
AU  - Branford,W
AU  - Cohen,LF
DO  - 10.1002/adfm.201902502
PY  - 2019///
SN  - 1616-301X
TI  - The biaxial strain dependence of magnetic order in spin frustrated mn3nin thin films
T2  - Advanced Functional Materials
UR  - http://dx.doi.org/10.1002/adfm.201902502
UR  - http://hdl.handle.net/10044/1/71568
VL  - 29
ER  -
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