Magnetic anisotropy peculiarities of high-temperature ferromagnetic MnxSi1−x (x ≈ 0.5) alloy films

A. B. Drovosekov; N. M. Kreines; A. O. Savitsky; S. V. Kapelnitsky; V. V. Rylkov; V. V. Tugushev; G. V. Prutskov; O. A. Novodvorskii; E. A. Cherebilo; E. T. Kulatov; Y. Wang; S. Zhou

doi:10.1209/0295-5075/115/37008

All issues

Volume 115 / No 3 (August 2016)

EPL, 115 3 (2016) 37008

Abstract

Issue		EPL Volume 115, Number 3, August 2016


Article Number		37008
Number of page(s)		6
Section		Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties
DOI		https://doi.org/10.1209/0295-5075/115/37008
Published online		09 September 2016

EPL, 115 (2016) 37008

Magnetic anisotropy peculiarities of high-temperature ferromagnetic Mn_xSi_1−x (x ≈ 0.5) alloy films

A. B. Drovosekov¹^(a), N. M. Kreines¹, A. O. Savitsky¹, S. V. Kapelnitsky², V. V. Rylkov²^,3, V. V. Tugushev², G. V. Prutskov², O. A. Novodvorskii⁴, E. A. Cherebilo⁴, E. T. Kulatov⁵, Y. Wang⁶ and S. Zhou⁶

¹ P.L. Kapitza Institute for Physical Problems RAS - Kosygina St. 2, 119334 Moscow, Russia
² National Research Centre “Kurchatov Institute” - Kurchatov Sq. 1, 123182 Moscow, Russia
³ Kotel'nikov Institute of Radio Engineering and Electronics RAS - 141190 Fryazino, Moscow region, Russia
⁴ Institute on Laser and Information Technologies RAS - Svyatoozerskaya St. 1, 140700 Shatura, Moscow region, Russia
⁵ Prokhorov General Physics Institute RAS - Vavilov St. 38, 119991 Moscow, Russia
⁶ Helmholtz-Zentrum Dresden-Rossendorf, Institute of Ion Beam Physics and Materials Research Bautzner Landstrasse 400, 01328 Dresden, Germany

^(a) drovosekov@kapitza.ras.ru

Received: 15 April 2016
Accepted: 19 August 2016

Abstract

Thin films of Mn_xSi_1−x alloys with different Mn concentration $x\approx0.44\text{--}0.63$ grown by the pulsed-laser deposition (PLD) method onto the Al₂O₃ (0001) substrate were investigated in the temperature range 4–300 K using ferromagnetic resonance (FMR) measurements in the wide range of frequencies $(f = 7\text{--}60\ \text{GHz})$ and magnetic fields $(H = 0\text{--}30\ \text{kOe})$ . For samples with $x\approx0.52\text{--}0.55$ , FMR data show clear evidence of ferromagnetism (FM) with high Curie temperatures $T_\mathrm{C} \sim 300\ \text{K}$ . These samples demonstrate the complex and unusual character of magnetic anisotropy described in the frame of phenomenological model as a combination of the essential second-order easy-plane anisotropy contribution and the additional fourth-order anisotropy contribution with the easy direction normal to the film plane. We explain the obtained results by a polycrystalline (mosaic) structure of the films caused by the film-substrate lattice mismatch.

PACS: 75.70.-i – Magnetic properties of thin films, surfaces, and interfaces / 75.30.Gw – Magnetic anisotropy / 76.50.+g – Ferromagnetic, antiferromagnetic, and ferrimagnetic resonances; spin-wave resonance

© EPLA, 2016

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