I S, Matteppanavar S, Krishna PSR, Rayaprol S, Babu PD, Angadi V J, Kubrin SP, Angadi B. Weak ferromagnetism and magnetoelectric coupling through the spin-lattice coupling in (1-
x)Pb(Fe
2/3W
1/3)O
3-(
x)BiFeO
3(
x= 0.1 and 0.4) solid solution.
JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2020;
32:425805. [PMID:
32610306 DOI:
10.1088/1361-648x/aba1aa]
[Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/29/2020] [Accepted: 07/01/2020] [Indexed: 06/11/2023]
Abstract
We report on the structure, spin-lattice and magneto-electric coupling in (1-x)Pb(Fe2/3W1/3)O3-(x)BiFeO3(wherex= 0.1 and 0.4) (PBFW) solid solution synthesized through two-step solid-state reaction method. The room temperature (RT) crystallographic studies were carried out using x-ray diffraction and neutron diffraction measurements which show a single-phasePseudocubiccrystal system withPm-3mspace group. Rietveld refinement was carried out to obtain the structural parameters usingFullprofsoftware and the observed structural parameters are in good agreement with the previous reports. Temperature-dependent neutron diffraction measurements reveal the presence of commensurate G-type antiferromagnetic structure. The magnetic structure was analyzed using the propagation wave vectork∼ (½ ½ ½) for both the solid solutions. The obtained lattice constants increase linearly and the magnetic moment decrease with temperature, which shows a remarkable anomaly around the magnetic (TN∼ 405 K forx= 0.1 and 531 K forx= 0.4) transition temperatures. This anomaly clearly indicates the existence of spin-lattice and magnetoelectric coupling. The magnetic susceptibility (ZFC and FC at 500 Oe) andM-Hhysteresis loop measurements show spontaneous magnetic moment due to the Fe3+-O2--Fe3+superexchange interaction coexisting with the weak ferromagnetism. Bifurcation of ZFC and FC curve reveals the strong anisotropic nature. Astonishingly, magnetic measurements show the non-zero magnetic moment aboveTNand broadening of the magnetic transition indicates the presence of short-range uncompensated sublattice weak ferromagnetic clusters in the paramagnetic region. The Mossbauer spectroscopy and electron paramagnetic resonance studies exhibit the RT magnetically ordered system and confirm the +3 state of Fe along with the fraction of Fe2+ions.
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