DOI: 10.1063/1.1362649. Magnetotransport of La0.7Sr0.3MnO3/SrTiO3 multilayers with ultrathin manganite layers

Magnetotransport of La0.7Sr0.3MnO3/SrTiO3 multilayers with ultrathin manganite layers

10.1063/1.1362649

Crossref journal-article

AIP Publishing

Journal of Applied Physics (317)

Abstract

The thickness dependence of electrical transport and magnetization of ultrathin La0.7Sr0.3MnO3 films has been investigated using epitaxial La0.7Sr0.3MnO3(LSMO)/SrTiO3 multilayers prepared by pulsed laser deposition. Layer thicknesses range from 1.9 to 10 nm for both constituents. Microstructural characterization by x-ray diffraction and transmission electron microscopy has confirmed a well-defined superlattice structure, coherent growth, and fairly smooth interfaces of the samples. Magnetization measurements show a pronounced drop of the ferromagnetic Curie temperature below a LSMO thickness of d=3 nm, accompanied by a strong rise of the coercive field. The in-plane electrical transport changes from metallic (dρ/dT&gt;0) to insulating at d∼2.3 nm. Three different types of magnetoresistance (MR) have been observed for d&lt;3 nm. In the sequence of decreasing d, the first resembles the grain boundary MR of polycrystalline LSMO, the second is positive, and the third is associated with a magnetic field-induced insulator-to-metal transition. Magnetic and transport results are discussed in the framework of a mixed-phase state of ferromagnetic metallic and less magnetically ordered insulating clusters in the ultrathin LSMO films.

Bibliography

DÃ¶rr, K., Walter, T., Sahana, M., MÃ¼ller, K.-H., Nenkov, K., Brand, K., & Schultz, L. (2001). Magnetotransport of La0.7Sr0.3MnO3/SrTiO3 multilayers with ultrathin manganite layers. Journal of Applied Physics, 89(11), 6973â6975.

Authors 7

K. Dörr (first)
T. Walter (additional)
M. Sahana (additional)
K.-H. Müller (additional)
K. Nenkov (additional)
K. Brand (additional)
L. Schultz (additional)

References 10 Referenced 28

10.1103/PhysRevB.60.6698 / Phys. Rev. B (1999)
10.1038/21142 / Nature (London) (1999)
10.1103/PhysRevLett.84.4485 / Phys. Rev. Lett. (2000)
10.1063/1.123806 / Appl. Phys. Lett. (1999)
{'key': '2024021015415561600_r5'}
10.1103/PhysRevLett.77.2041 / Phys. Rev. Lett. (1996)
10.1016/S0304-8853(96)00647-6 / J. Magn. Magn. Mater. (1997)
K. Dörr , K.-H. Müller, T. Walter, M. Sahana, D. Eckert, K. Nenkov, K. Brand, M. Lehmann, and L. Schultz, Report cond-mat 0012512.
10.1016/0038-1098(95)00538-2 / Solid State Commun. (1995)
{'key': '2024021015415561600_r10', 'first-page': '545', 'volume': '62', 'year': '2000', 'journal-title': 'Phys. Rev. B'} / Phys. Rev. B (2000)

Dates

Type	When
Created	23 years, 1 month ago (July 26, 2002, 10:17 a.m.)
Deposited	1 year, 6 months ago (Feb. 10, 2024, 11:44 a.m.)
Indexed	1 year, 6 months ago (Feb. 10, 2024, 12:10 p.m.)
Issued	24 years, 2 months ago (June 1, 2001)
Published	24 years, 2 months ago (June 1, 2001)
Published Print	24 years, 2 months ago (June 1, 2001)

Funders 0

None

BibTeX

@article{D_rr_2001, title={Magnetotransport of La0.7Sr0.3MnO3/SrTiO3 multilayers with ultrathin manganite layers}, volume={89}, ISSN={1089-7550}, url={http://dx.doi.org/10.1063/1.1362649}, DOI={10.1063/1.1362649}, number={11}, journal={Journal of Applied Physics}, publisher={AIP Publishing}, author={Dörr, K. and Walter, T. and Sahana, M. and Müller, K.-H. and Nenkov, K. and Brand, K. and Schultz, L.}, year={2001}, month=jun, pages={6973–6975} }

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