Magnetic structure of Mn2GaC by neutron diffraction
Magnetic MAX phases are interesting for potential application in spintronics and as precursor for magnetic 2D materials. Mn2GaC is a prototype magnetic MAX phases, consisting of Mn2C layers interleaved with Ga layers. It shows two magnetic transitions at TN=507 K and Tc=220 K. We did neutron diffraction experiment on Mn2GaC thin film sample along (00L) direction at HB1A at ORNL and Super Adam at ILL. The results suggest that the propagation vector is incommensurate with a small component along a* and/or b*. We propose to study the magnetic structure with D10 to scan the peak at Q=0.73 and Q=0.25 along a* and b* to determine the propagation vector, and then scan several peaks around (00L) and (10L) to refine the spin orientation. The sample is 10mm*10mm*100nm, epitaxially grown on MgO (111). Previous neutron diffraction experiments demonstrate the feasibility and magnetic Bragg peaks are comparable to (004) nuclear peak in intensity.
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Quanzheng Tao; BEAUVOIS Ketty; BOOTHROYD Andrew Timothy; DAHLQVIST Martin; A.S. Ingason; MOCKUTE Aurelija; OULADDIAF Bachir; QURESHI Navid and ROSEN Johanna. (2021). Magnetic structure of Mn2GaC by neutron diffraction. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.5-54-325
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