Dielectric characterization of multiferroic magnetoelectric double-perovskite Y(Ni0.5Mn0.5)O3 thin films

Abstract

We report on functional properties of Y(Ni 0.5 Mn 0.5 )O 3 epitaxial thin films, growth by pulsed laser deposition, observing clear features of its ferroelectric and ferromagnetic nature at cryogenic temperature. Temperature-dependent complex impedance spectroscopy (IS) characterization has shown a dielectric anomaly around the ferromagnetic Curie temperature ( 100 K) indicative of coupling between magnetic and electric orders.Multiferroic materials, those showing ferroelectric and anti-/ferromagnetic order, are being deeply studied because of their possible applicability to spintronics technology and others if significant coupling between both (named magnetoelectric coupling) exist In this paper, we focus on the multiferroic properties of YNMO perovskite epitaxial thin films grown by Pulsed Laser Deposition(PLD). We will investigate two set of films in order to access information along different directions: YNMO (001) Impedance data have been analysed in order to extract the intrinsic dielectric permittivity of the film, as further described in this article, following analyses described elsewhere 51,52 .Low temperature and under magnetic field measurements have been carried on a cryostat equipped with a superconducting magnet (Physical Properties Measurement System (PPMS), Quantum-Design Co.) Figure 1 shows the presence of (00l) family of planes reflections for the sample grown on STO(001) (Figure 1(a)), and (lll) for the one on STO(111) (Figure 1(b)). It can be also observed that there is no presence of any spurious phase meaning that the films are single phase. More detailed morphological and structural characterization can be found 5 elsewhere 40,53 , in which similar films are shown to be fully textured and epitaxial.Summarizing, the use of two different substrate orientations has allowed to obtain YNMO(001)/Nb:STO(001) and YNMO(111)/Nb:STO(111) films.

High-temperature Magnetodielectric Bi(Fe0.5Mn0.5)O3 Thin Films with Checkerboard-Ordered Oxyg

“…The magnitude of the magnetic field at the sample position is tested by Gaussmeter measurement. Impedance data is analyzed in order to extract the intrinsic dielectric permittivity of the film, as described below, following analyzes described elsewhere [16,49,52].…”

“…This representation is vital in order to avoid the confusion of intrinsic and extrinsic effects [87]. These two contributions, one at high frequencies and the other at low, have been explored before in single-perovskite thin films (BMO and BFO [88]) as well as for double perovskites [49,89]. It is clear by now that each contribution is related to a different mechanism, with the high-frequency contribution, containing the intrinsic properties of the perovskite, while the low frequencies represent the extrinsic effects in the compound and experimental setup.…”

“…The presence of these ions is responsible for the crystal structure symmetry breaking [6,7] and the generation of spontaneous polarization. Among the double perovskites, the ferromagnetic La 2 NiMnO 6 [8][9][10][11][12][13][14][15], and multiferroic Y 2 NiMnO 6 [16][17][18][19][20][21][22], Bi 2 NiMnO 6 [4,[23][24][25][26][27] are among the most promising and broadly studied. However, ferroelectric and ferromagnetic coexistence has encouraged the disparate Bi-based double * coyeme@amu.edu.pl perovskites, such as Bi 2 CoMnO 6 [28] and Bi 2 FeMnO 6 , to be revisited [29][30][31][32][33][34][35][36][37].…”

Magnetocaloric effects from an interplay of magnetic sublattices in Nd2NiMnO6

“…Double perovskites (DPs) with the general formula A 2 BB O 6 , where A is a rare-earth, alkali or alkaline-earth ion and B, B are transition metal ions, form a fundamentally interesting and technologically important class of oxides [1][2][3][4][5][6][7]. DPs exhibit a variety of application oriented phenomena such as, magnetocaloric effect (MCE), magnetoelectric coupling, magnetocapacitance, magnetoresistance, magnetoelasticity and thermoelectric effect [8][9][10][11][12][13][14][15][16][17][18]. The origin of most of these phenomena is tied to the existence of various magnetic phase transitions and their sensitivity to external fields.…”

Large Magnetocaloric effect and magnetic phase transitions in Nd$_2$NiMnO$_6$

“…Introduction: Double perovskites (DPs) with the general formula A 2 BB ′ O 6 , where A is a rare-earth, alkali or alkaline-earth ion and B, B ′ are transition metal ions, form a fundamentally interesting and technologically important class of oxides [1][2][3][4][5][6][7] . DPs exhibit a variety of application oriented phenomena such as, magnetocaloric effect, magnetoelectric coupling, magnetocapacitance, magnetoresistance, magnetoelasticity and thermoelectric effect [8][9][10][11][12][13][14][15][16][17] . The origin of most of these phenomena is tied to the existence of various magnetic phase transitions.…”