Mechanochemical synthesis of yttrium manganite

Influence of the orthorhombic phase content on the dielectric and magnetic properties of YMnO3

“…In this phase, both ferroelectric and magnetic orders are intimately related, as the former is induced by the latter, therefore giving rise to similar order temperatures. Hence, the antiferromagnetic order type E of this phase has a Néel temperature T o N of about 40 K whereas the ferroelectric transition is about 30 K 1,4,5,28 .…”

“…This interesting effect is due to the coupling between the ferroelectric and magnetic orders of the system, and it could be very useful for technological applications, such as sensors, magnetic data storage, non-volatile memory, transducers, magnetoelectronic devices, or spintronics. [1][2][3] . However, although the complex coupling between orbital, spin, charge and lattice degrees of freedom in perovskites gives rise to remarkable properties such as ferroelectricity or colossal magnetoresistance, there are few examples of multiferroic perovskites.…”

“…phase stabilized by means of special synthesis methods, as mechanochemical synthesis, annealing at high pressures or synthesis at high temperatures 1,[4][5][6] . It is noteworthy that the multiferroic order in both structures has different sources, as it is also the case for HoMnO 3 7,8 .…”

Study of gadolinium substitution effects in hexagonal yttrium manganite YMnO3

“…In addition to ferroelectric and antiferromagnetic properties, hexagonal YMnO 3 is a narrow-band gap semiconductor, which can be utilized as photocatalyst for the degradation of organic pollutants under ultraviolet and visible light irradiation and gas sensing application 11 – 13 . According to literature, YMnO 3 with orthorhombic structure can be prepared by a number of synthetic approaches such as mechanochemical synthesis 14 , epitaxial strain 15 or other low-temperature syntheses 16 . For the preparation of hexagonal YMnO 3 few synthesis methods were also reported, including sol–gel 17 , solid-state 18 , hydrothermal 19 , polymerized complex method 20 and glycine-nitrate combustion 21 .…”

Processing and properties of pure antiferromagnetic h-YMnO3

“…Various synthetic methods are used for the preparation of YMO. Metastable o-YMO can be prepared either by methods involving high temperature and pressure [8][9][10][11] or by mechanochemical synthesis [12,13]. Hexagonal YMO can be prepared by solid state reactions [4,[14][15][16][17], hydrothermal processes [18][19][20] and chemical methods [11,[21][22][23][24][25].…”