Exchange bias in La0.7Sr0.3CrO3/La0.7Sr0.3MnO3/La0.7Sr0.3CrO3 heterostructures

Olmos, Rubyann; Iturriaga, Hector; Blazer, Dawn S.; Koohfar, Sanaz; Gandha, Kinjal; Nlebedim, Ikenna C.; Kumah, Divine P.; Singamaneni, Srinivasa R.

doi:10.1063/1.5130453

Exchange bias in La_0.7Sr_0.3CrO₃/La_0.7Sr_0.3MnO₃/La_0.7Sr_0.3CrO₃ heterostructures

Journal Article · Wed Jan 01 23:00:00 EST 2020 · AIP Advances

DOI:https://doi.org/10.1063/1.5130453· OSTI ID:1581769

^[1]; Iturriaga, Hector ^[1]; Blazer, Dawn S. ^[1]; Koohfar, Sanaz ^[2]; Gandha, Kinjal ^[3]; Nlebedim, Ikenna C. ^[3]; ^[2]; Singamaneni, Srinivasa R. ^[1]

Univ. of Texas at El Paso, TX (United States)
North Carolina State Univ., Raleigh, NC (United States)
Ames Lab., Ames, IA (United States)

In the recent past, heterostructures of magnetic oxide thin films have attracted a great deal of research excitement due to very interesting physical properties such as antiferromagnetic interlayer coupling, tunable exchange-bias, interfacial driven magnetic properties and high mobility electron gas across the interfaces. In this work, we report on the comprehensive magnetic properties observed from the heterostructures of (2 unit cells) La_0.7Sr_0.3CrO₃/(8 unit cells) La_0.7Sr_0.3MnO₃/(2 unit cells) La_0.7Sr_0.3CrO₃, which are epitaxially deposited on SrTiO₃ substrate by plasma-assisted oxide molecular beam epitaxy. Using SQUID magnetometer, the magnetic properties are studied when the magnetic field was applied both in plane and out of plane. The Curie temperature of this structure is found to be at 290 K. Most significantly, at 2 K, we observed a complete up/down shift (along magnetization axis) of hysteresis loop when the sample was cooled under a magnetic field of ± 5000 Oe in the in-plane configuration. We believe that the strong antiferromagnetic (super) exchange coupling of Mn-Cr across the two interfaces is responsible for the observed exchange bias. We will present and discuss our in-detailed experimental findings collected on this heterostructure as a function of temperature and magnetic field.

View Accepted Manuscript (DOE)

Research Organization:: Ames Laboratory (AMES), Ames, IA (United States)

Sponsoring Organization:: USDOE Office of Energy Efficiency and Renewable Energy (EERE)

Grant/Contract Number:: AC02-07CH11358

OSTI ID:: 1581769

Alternate ID(s):: OSTI ID: 1580790

Report Number(s):: IS-J--10091

Journal Information:: AIP Advances, Journal Name: AIP Advances Journal Issue: 1 Vol. 10; ISSN 2158-3226

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

Country of Publication:: United States

Language:: English

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Exchange bias in La_0.7Sr_0.3CrO₃/La_0.7Sr_0.3MnO₃/La_0.7Sr_0.3CrO₃ heterostructures