Open AccessВлияние плотности энергии лазерного пучка на магнитные свойства тонких пленок Mn-=SUB=-x-=/SUB=-Si-=SUB=-1-x-=/SUB=- (x~0.5), приготовленных методом импульсного лазерного осаждения
Author(s) -
А. Б. Дровосеков,
А.О. Савицкий,
Н. М. Крейнес,
V. V. Rylkov,
С. Н. Николаев,
К. Ю. Черноглазов,
А. Н. Талденков,
Е. А. Черебыло,
В. А. Михалевский,
О. А. Новодворский,
К. И. Маслаков,
Parul Pandey,
Shengqiang Zhou
Publication year - 2018
Publication title -
fizika tverdogo tela
Language(s) - English
Resource type - Journals
eISSN - 1726-7498
pISSN - 0367-3294
DOI - 10.21883/ftt.2018.11.46655.21nn
Subject(s) - pulsed laser deposition , curie temperature , materials science , analytical chemistry (journal) , manganese , substrate (aquarium) , phase (matter) , crystallite , ferromagnetism , alloy , thin film , condensed matter physics , chemistry , metallurgy , nanotechnology , physics , oceanography , organic chemistry , chromatography , geology
—The effect of laser pulse energy E on the possibility of forming of a homogeneous “high-temperature” ferromagnetic phase in Mn_ x Si_1 – _ x ( x ≈ 0.5) alloy films grown by pulsed laser deposition onto an Al_2O_3 (0001) substrate has been studied. The high-temperature phase with manganese concentration x ≈ 0.53 and the Curie temperature T _C ~ 200–300 K is shown to form near the substrate at the initial stage of the film growth. In this case, high values E ≥ 6.8 J/cm^2 favor the stabilization of this phase over all film thickness, while low values E = 2.6–5.7 J/cm^2 lead to a decrease in the manganese concentration in the upper film layer and the formation of additional “low–temperature” phase with T _C ≈ 30–50 K provided by silicides MnSi and Mn_4Si_7 crystallites.