Ferroelectric polarization control of magnetic anisotropy in $\mathrm{PbZ}{\mathrm{r}}_{0.2}\mathrm{T}{\mathrm{i}}_{0.8}{\mathrm{O}}_3$ / $\mathrm{L}{\mathrm{a}}_{0.8}\mathrm{S}{\mathrm{r}}_{0.2}\mathrm{Mn}{\mathrm{O}}_3$ heterostructures

Journal Article · Fri Feb 08 00:00:00 EST 2019 · Physical Review Materials

DOI:https://doi.org/10.1103/PhysRevMaterials.3.021401· OSTI ID:1596913

Rajapitamahuni, A. ^[1]; Tao, L. L. ^[2]; Hao, Y. ^[2]; Song, J. ^[2]; Xu, X. ^[2]; Tsymbal, E. Y. ^[2]; Hong, Xia ^[2]

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1. Univ. of Nebraska, Lincoln, NE (United States); University of Nebraska-Lincoln
2. Univ. of Nebraska, Lincoln, NE (United States)

The interfacial coupling between the switchable polarization and neighboring magnetic order makes ferroelectric/ferromagnetic composite structures a versatile platform to realize voltage control of magnetic anisotropy. Here, we report the nonvolatile ferroelectric field effect modulation of the magnetocrystalline anisotropy (MCA) in epitaxial $\mathrm{PbZ}{\mathrm{r}}_{0.2}\mathrm{T}{\mathrm{i}}_{0.8}{\mathrm{O}}_3$ (PZT)/ $\mathrm{L}{\mathrm{a}}_{0.8}\mathrm{S}{\mathrm{r}}_{0.2}\mathrm{Mn}{\mathrm{O}}_3$ (LSMO) heterostructures grown on (001) $\mathrm{SrTi}{\mathrm{O}}_3$ substrates. Planar Hall effect measurements show that the in-plane magnetic anisotropy energy in LSMO is enhanced by about 22% in the hole accumulation state compared to the depletion state, in quantitative agreement with our first-principles density functional theory calculations. Modeling the spin-orbit coupling effect with second-order perturbation theory points to the critical role of the $d$ -orbital occupancy in controlling MCA. Our work provides insights into the effect of ferroelectric polarization on the magnetic anisotropy at the composite multiferroic interfaces, paving the way for their implementation into high-performance, low-power spintronic applications.

• Research Organization: Univ. of Nebraska, Lincoln, NE (United States)
• Sponsoring Organization: National Science Foundation (NSF); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
• Grant/Contract Number: SC0016153
• OSTI ID: 1596913
• Alternate ID(s): OSTI ID: 1493968
• Journal Information: Physical Review Materials, Journal Name: Physical Review Materials Journal Issue: 2 Vol. 3; ISSN PRMHAR; ISSN 2475-9953
• Publisher: American Physical Society (APS)
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
Ferroelectric Field Effect
Magnetic Anisotropy
Multiferroic Interface