Electrostatic tuning of magnetism at the conducting (111) (La0.3Sr0.7)(Al 0.65Ta0.35)/SrTiO3 interface

Bal, V. V.; Huang, Z.; Han, K.; Ariando, .; Venkatesan, T.; Chandrasekhar, V.

doi:10.1063/1.4986912

Title: Electrostatic tuning of magnetism at the conducting (111) (La_0.3Sr_0.7)(Al _0.65Ta_0.35)/SrTiO₃ interface

Journal Article · Mon Aug 21 00:00:00 EDT 2017 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4986912· OSTI ID:1473860

Bal, V. V. ^[1]; Huang, Z. ^[2];

^[2]; Ariando, . ^[3];

^[4]; Chandrasekhar, V. ^[1]

Northwestern Univ., Evanston, IL (United States). Dept. of Physics
National Univ. of Singapore (Singapore). NUSNNI-Nanocore, and Dept. of Physics
National Univ. of Singapore (Singapore). NUSNNI-Nanocore, and Dept. of Physics, and NUS Graduate School for Integrative Sciences and Engineering
National Univ. of Singapore (Singapore). NUSNNI-Nanocore, Dept. of Physics, NUS Graduate School for Integrative Sciences and Engineering, Dept. of Electrical and Computer Engineering, and Dept. of Material Science and Engineering

We present measurements of the low temperature electrical transport properties of the two dimensional carrier gas that forms at the interface of (111) (La_0.3Sr_0.7)(Al_0.65Ta_0.35)/SrTiO₃ as a function of applied back gate voltage, V_g. As is found in (111) LaAlO₃/SrTiO₃ interfaces, the low-field Hall coefficient is electron-like but shows a sharp reduction in magnitude below V _g~ 20 V, indicating the presence of hole-like carriers in the system. This same value of V_g correlates approximately with the gate voltage below which the magnetoresistance evolves from nonhysteretic to hysteretic behavior at millikelvin temperatures, signaling the onset of magnetic order in the system. Finally, we believe our results can provide insight into the mechanism of magnetism in SrTiO₃ based systems.

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Research Organization:: Northwestern Univ., Evanston, IL (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: FG02-06ER46346

OSTI ID:: 1473860

Alternate ID(s):: OSTI ID: 1376916

Journal Information:: Applied Physics Letters, Vol. 111, Issue 8; ISSN 0003-6951

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 6 works

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Title: Electrostatic tuning of magnetism at the conducting (111) (La0.3Sr0.7)(Al 0.65Ta0.35)/SrTiO3 interface

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Title: Electrostatic tuning of magnetism at the conducting (111) (La_0.3Sr_0.7)(Al _0.65Ta_0.35)/SrTiO₃ interface