Induction and control of room-temperature ferromagnetism in dilute Fe-doped SrTiO3 ceramics

Abstract

The magnetic characteristics of dilute Fe-doped SrTiO3 ceramics are studied. The room-temperature ferromagnetism (with transition temperature around 650 K) is successfully realized in Sr0.98Ti0.9Fe0.1O3−δ and Sr0.98Ti0.92Fe0.1O3−δ ceramics. It is found that a fine-tuning of the components could alter the substitution sites of Fe ions and in-turn modulates the magnetism of the material. A systematic analysis reveals that the co-substitution of Fe ions at nonequivalent A and B sites in ABO3 type perovskites is in favor of the ferromagnetism, which could be attributed to the mixed-valence-states of Fe ions and the variation of exchange interactions. This work provides an innovation for the induction and control of ferromagnetism in dilute magnetic materials.

Multiferroic Properties and Magnetoelectric Coupling of Fe‐Doped (Ba0.7Ca0.3)TiO3‐Ba(Zr0.2Ti0.8)O3 Ceramics

“…On the other hand, the independent origins of ferroelectricity and magnetism limit the coupling between them . Similar results were also obtained in magnetic ion‐doped PbTiO 3 , Bi 4 Ti 3 O 12 , K 0.45 Na 0.49 Li 0.06 NbO 3 , and SrTiO 3 . Recently, Mandal et al designed a room temperature magnetoelectric material by constructing a percolating network of magnetic units with strong superexchange interaction in morphotropic phase boundary (MPB) 0.85BiTi 0.1 Fe 0.8 Mg 0.1 O 3 –0.15CaTiO 3 ceramics, and the canting of the antiferromagnetic structure contributes to the ferromagnetism .…”

Iron-doping induced multiferroic in two-dimensional In2Se3

“…Besides, doping magnetic atoms into 2D material has been realized in Codoped MoS 2 , Fe-doped SnS 2 in our previous work [21,22]. Doping ferromagnetic atoms such as Fe, Co and Mn into ferroelectric materials such as BaTiO 3 and SrTiO 3 has been realized to achieve room-temperature multiferroic [23][24][25]. Furthermore, some research groups proposed multiferroic materials by doping or modifying some monolayers, such as black phosphorus and graphene [26].…”

Effect of Pr-Fe doping on dielectric and modulus properties of SrTiO3 films

“…Therefore, exploiting new materials that let magnetism and ferroelectricity coexist in a single phase above room temperature have become a hot spot [5]. SrTiO 3 (STO), as a quantum paraelectric material, shows many interesting properties, including ferroelectric behavior, ferromagnetism, superconductivity etc., which is related to the lattice vibration, electric polarization, and the transportation of electrons in the matrix of the STO lattice [6][7][8]. With the development of the multiferroics, the coexistence of two or more properties in SrTiO 3 will be received extensive concern in the future [7,9].…”

“…SrTiO 3 (STO), as a quantum paraelectric material, shows many interesting properties, including ferroelectric behavior, ferromagnetism, superconductivity etc., which is related to the lattice vibration, electric polarization, and the transportation of electrons in the matrix of the STO lattice [6][7][8]. With the development of the multiferroics, the coexistence of two or more properties in SrTiO 3 will be received extensive concern in the future [7,9]. Kim et al [5] reported a room temperature multiferroic properties in (Fe x , Sr 1-x )TiO 3 thin films.…”