Neutron powder diffraction study of Pb[Zrx(Fe2/3W1/3)1–x]O3 solid solutions. Issue 6 (9th February 2015)

• Record Type: Journal Article
• Authors: Frantti, J.; Fujioka, Y.; Zhang, J.; Zhu, J.; Vogel, S. C.
• Is Part Of: Physica status solidi. Volume 252:Issue 6(2015:Jun.)
• Page Start: 1280
• Page End: 1290
• Publication Date: 2015-02-09
• Subjects: Solid state physics -- Periodicals; Solids -- Periodicals; Atomic structure -- Periodicals; 530.41
• DOI: 10.1002/pssb.201451421
• Languages: English
• ISSNs: 0370-1972

Abstract

<abstract abstract-type="main" xml:lang="en"> <title> <x xml:space="preserve">Abstract</x> </title> <sec id="pssb201451421-sec-0001" sec-type="section"> <p>This study presents the structural and magnetic properties of solid solutions Pb[Zr<italic><sub>x</sub></italic>(Fe<sub>2/3</sub>W<sub>1/3</sub>)<sub>1−<italic>x</italic></sub>]O<sub>3</sub> (PZFW), with <italic>x </italic>= 0.35 and 0.60. The focus is on the study of magnetic ordering and the co‐existing electrical dipole moments as a function of temperature. Neutron powder diffraction (NPD) measurements showed that both samples possess a pseudo‐cubic structure. A <italic>G</italic>‐type antiferromagnetic (AFM) order onsets at around 150 K in PZFW with <italic>x </italic>= 0.35, accompanied by a broad hump in the magnetization, magnetic peak width determined from the NPD patterns, and thermal expansion versus temperature curve, which indicate a diffusive phase transition. Weak anomalous thermal expansion was assigned to the spontaneous magnetostriction. A susceptibility cusp characteristic to an AFM ordering was observed at 15 K though no evident change was observed in the NPD patterns at 12 K. The magnetic behavior is assigned to different size clusters: with decreasing temperature a larger fraction of the material becomes magnetically ordered. Remnant magnetization was observed in PZFW with <italic>x</italic> = 0.35 at 2 K. No magnetic reflections were seen in PZFW with <italic>x </italic>= 0.60 down to 12 K. Magnetometer measurements revealed a weak AFM cusp at 8 K, confirmed by hysteresis loop measurements. The off‐center Pb‐displacements and the oxygen octahedra displacement along the cubic axis with respect to the <italic>B</italic>‐cations generate an electric dipole moment.</p> </sec> </abstract>