Thickness dependent magnetic anisotropy of ultrathin LCMO epitaxial thin films

Norbert Marcel Nemes; Mar García-Hernández; Zsolt Szatmári; Titusz Fehér; Ferenc Simon; Cristina Visani; Vanessa Peña; Christian Miller; Javier García-Barriocanal; Flavio Bruno; Zouhair Sefrioui; Carlos Leon; Jacobo Santamaría

doi:10.1109/TMAG.2008.2001523

Thickness dependent magnetic anisotropy of ultrathin LCMO epitaxial thin films

Norbert Marcel Nemes
, Mar García-Hernández
, Zsolt Szatmári
, Titusz Fehér
, Ferenc Simon
, Cristina Visani
, Vanessa Peña
, Christian Miller
, Javier García-Barriocanal
, Flavio Bruno
, Zouhair Sefrioui
, Carlos Leon
, Jacobo Santamaría

Research output: Contribution to journal › Article › peer-review

13 Scopus citations

Abstract

The magnetic properties of La_0.7Ca_0.3MnO₃ (LCMO) manganite thin films were studied with magnetometry and ferromagnetic resonance as a function of film thickness. They maintain the colossal magnetoresistance behavior with a pronounced metal-insulator transition around 150-200 K, except for the very thinnest films studied (3 nm). Nevertheless, LCMO films as thin as 3 nm remain ferromagnetic, without a decrease in saturation magnetization, indicating an absence of dead-layers, although below approximately 6 nm the films remain insulating at low temperature. Magnetization hysteresis loops reveal that the magnetic easy axes lie in the plane of the film for thicknesses in the range of 4-15 nm. Ferromagnetic resonance studies confirm that the easy axes are in-plane, and find a biaxial symmetry in-plane with two, perpendicular easy axes. The directions of the easy axes with respect to the crystallographic directions of the cubic SrTiO₃ substrate differ by 45 deg in 4-and 15-nm-thick LCMO films.

Original language	English (US)
Pages (from-to)	2926-2929
Number of pages	4
Journal	IEEE Transactions on Magnetics
Volume	44
Issue number	11 PART 2
DOIs	https://doi.org/10.1109/TMAG.2008.2001523
State	Published - Nov 2008
Externally published	Yes

Bibliographical note

Funding Information:
The work of N. M. Nemes was supported by a “Ramon y Cajal” fellowship funded by the Spanish Ministry of Science and Education. This work was supported in part by SPIN-MAT06024 C01 and C02 and by Marie-Curie-IRG under Grant 024861 and by OTKA PF63954, K68807, and NK60984.

Keywords

Epitaxial layers
Magnetic anisotropy
Magnetic resonance
Manganites
Thin films

Publisher link

10.1109/TMAG.2008.2001523

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Nemes, N. M., García-Hernández, M., Szatmári, Z., Fehér, T., Simon, F., Visani, C., Peña, V., Miller, C., García-Barriocanal, J., Bruno, F., Sefrioui, Z., Leon, C., & Santamaría, J. (2008). Thickness dependent magnetic anisotropy of ultrathin LCMO epitaxial thin films. IEEE Transactions on Magnetics, 44(11 PART 2), 2926-2929. https://doi.org/10.1109/TMAG.2008.2001523

Nemes, NM, García-Hernández, M, Szatmári, Z, Fehér, T, Simon, F, Visani, C, Peña, V, Miller, C, García-Barriocanal, J, Bruno, F, Sefrioui, Z, Leon, C & Santamaría, J 2008, 'Thickness dependent magnetic anisotropy of ultrathin LCMO epitaxial thin films', IEEE Transactions on Magnetics, vol. 44, no. 11 PART 2, pp. 2926-2929. https://doi.org/10.1109/TMAG.2008.2001523

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title = "Thickness dependent magnetic anisotropy of ultrathin LCMO epitaxial thin films",

abstract = "The magnetic properties of La0.7Ca0.3MnO3 (LCMO) manganite thin films were studied with magnetometry and ferromagnetic resonance as a function of film thickness. They maintain the colossal magnetoresistance behavior with a pronounced metal-insulator transition around 150-200 K, except for the very thinnest films studied (3 nm). Nevertheless, LCMO films as thin as 3 nm remain ferromagnetic, without a decrease in saturation magnetization, indicating an absence of dead-layers, although below approximately 6 nm the films remain insulating at low temperature. Magnetization hysteresis loops reveal that the magnetic easy axes lie in the plane of the film for thicknesses in the range of 4-15 nm. Ferromagnetic resonance studies confirm that the easy axes are in-plane, and find a biaxial symmetry in-plane with two, perpendicular easy axes. The directions of the easy axes with respect to the crystallographic directions of the cubic SrTiO3 substrate differ by 45 deg in 4-and 15-nm-thick LCMO films.",

keywords = "Epitaxial layers, Magnetic anisotropy, Magnetic resonance, Manganites, Thin films",

author = "Nemes, \{Norbert Marcel\} and Mar Garc{\'i}a-Hern{\'a}ndez and Zsolt Szatm{\'a}ri and Titusz Feh{\'e}r and Ferenc Simon and Cristina Visani and Vanessa Pe{\~n}a and Christian Miller and Javier Garc{\'i}a-Barriocanal and Flavio Bruno and Zouhair Sefrioui and Carlos Leon and Jacobo Santamar{\'i}a",

note = "Funding Information: The work of N. M. Nemes was supported by a {\textquotedblleft}Ramon y Cajal{\textquotedblright} fellowship funded by the Spanish Ministry of Science and Education. This work was supported in part by SPIN-MAT06024 C01 and C02 and by Marie-Curie-IRG under Grant 024861 and by OTKA PF63954, K68807, and NK60984.",

year = "2008",

month = nov,

doi = "10.1109/TMAG.2008.2001523",

language = "English (US)",

volume = "44",

pages = "2926--2929",

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publisher = "Institute of Electrical and Electronics Engineers Inc.",

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T1 - Thickness dependent magnetic anisotropy of ultrathin LCMO epitaxial thin films

AU - Nemes, Norbert Marcel

AU - García-Hernández, Mar

AU - Szatmári, Zsolt

AU - Fehér, Titusz

AU - Simon, Ferenc

AU - Visani, Cristina

AU - Peña, Vanessa

AU - Miller, Christian

AU - García-Barriocanal, Javier

AU - Bruno, Flavio

AU - Sefrioui, Zouhair

AU - Leon, Carlos

AU - Santamaría, Jacobo

N1 - Funding Information: The work of N. M. Nemes was supported by a “Ramon y Cajal” fellowship funded by the Spanish Ministry of Science and Education. This work was supported in part by SPIN-MAT06024 C01 and C02 and by Marie-Curie-IRG under Grant 024861 and by OTKA PF63954, K68807, and NK60984.

PY - 2008/11

Y1 - 2008/11

N2 - The magnetic properties of La0.7Ca0.3MnO3 (LCMO) manganite thin films were studied with magnetometry and ferromagnetic resonance as a function of film thickness. They maintain the colossal magnetoresistance behavior with a pronounced metal-insulator transition around 150-200 K, except for the very thinnest films studied (3 nm). Nevertheless, LCMO films as thin as 3 nm remain ferromagnetic, without a decrease in saturation magnetization, indicating an absence of dead-layers, although below approximately 6 nm the films remain insulating at low temperature. Magnetization hysteresis loops reveal that the magnetic easy axes lie in the plane of the film for thicknesses in the range of 4-15 nm. Ferromagnetic resonance studies confirm that the easy axes are in-plane, and find a biaxial symmetry in-plane with two, perpendicular easy axes. The directions of the easy axes with respect to the crystallographic directions of the cubic SrTiO3 substrate differ by 45 deg in 4-and 15-nm-thick LCMO films.

AB - The magnetic properties of La0.7Ca0.3MnO3 (LCMO) manganite thin films were studied with magnetometry and ferromagnetic resonance as a function of film thickness. They maintain the colossal magnetoresistance behavior with a pronounced metal-insulator transition around 150-200 K, except for the very thinnest films studied (3 nm). Nevertheless, LCMO films as thin as 3 nm remain ferromagnetic, without a decrease in saturation magnetization, indicating an absence of dead-layers, although below approximately 6 nm the films remain insulating at low temperature. Magnetization hysteresis loops reveal that the magnetic easy axes lie in the plane of the film for thicknesses in the range of 4-15 nm. Ferromagnetic resonance studies confirm that the easy axes are in-plane, and find a biaxial symmetry in-plane with two, perpendicular easy axes. The directions of the easy axes with respect to the crystallographic directions of the cubic SrTiO3 substrate differ by 45 deg in 4-and 15-nm-thick LCMO films.

KW - Epitaxial layers

KW - Magnetic anisotropy

KW - Magnetic resonance

KW - Manganites

KW - Thin films

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UR - https://www.scopus.com/pages/publications/85130088751#tab=citedBy

U2 - 10.1109/TMAG.2008.2001523

DO - 10.1109/TMAG.2008.2001523

M3 - Article

AN - SCOPUS:77954216383

SN - 0018-9464

VL - 44

SP - 2926

EP - 2929

JO - IEEE Transactions on Magnetics

JF - IEEE Transactions on Magnetics

IS - 11 PART 2

ER -

Thickness dependent magnetic anisotropy of ultrathin LCMO epitaxial thin films

Abstract

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Keywords

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