Tuning magnetic spirals beyond room temperature with chemical disorder

Abstract

In the past years, magnetism-driven ferroelectricity and gigantic magnetoelectric effects have been reported for a number of frustrated magnets with spiral magnetic orders. Such materials are of high current interest due to their potential for spintronics and low-power magnetoelectric devices. However, their low magnetic order temperatures (typically <100K) greatly restrict their fields of application. Here we demonstrate that the stability domain of the spiral phase in the perovskite YBaCuFeO5 can be enlarged by more than 150K through a controlled manipulation of the Fe/Cu chemical disorder. Moreover we show that this novel mechanism can stabilize the magnetic spiral state of YBaCuFeO5 above the symbolic value of 25°C at zero magnetic field. Our findings demonstrate that the properties of a magnetic spiral, including its wavelength and stability range, can be engineered through the control of chemical disorder, offering a great potential for the design of materials with magnetoelectric properties beyond room temperature.

4 Figures

References in corpus (6)

• Spin current and magneto-electric effect in non-collinear magnets
• Cupric chloride CuCl2 as an S=1/2 chain multiferroic
• Multiferroicity with high-Tc in ceramics of the YBaCuFeO5 ordered perovskite
• Incommensurate magnetic structure, Fe/Cu chemical disorder and magnetic interactions in the high-temperature multiferroic YBaCuFeO5
• Tuning order-by-disorder multiferroicity in CuO by doping
• Influence of disorder on the structural phase transition and magnetic interactions in Ba${}_{3-x}$Sr${}_x$Cr${}_2$O${}_8$

Cited by in corpus (5)

• Synthetic chiral magnets promoted by the Dzyaloshinskii-Moriya interaction
• Tuning the tilting of the spiral plane by Mn doping in YBaCuFeO5 multiferroic
• Low temperature magnetic and dielectric properties of LnBaCuFeO5 (Ln = Nd, Eu, Gd, Ho and Yb)
• Relieving the frustration through Mn${}^{3+}$ substitution in Holmium Gallium Garnet
• Laue three dimensional neutron diffraction