scholarly journals Structure and Magnetic Properties of Gd/Ti Nanoscale Multilayers

2010 ◽  
Vol 168-169 ◽  
pp. 281-284 ◽  
Author(s):  
Andrey V. Svalov ◽  
V.O. Vas’kovskiy ◽  
José M. Barandiarán ◽  
K.G. Balymov ◽  
A.N. Sorokin ◽  
...  

Structure and magnetic properties of nanoscale [Gd/Ti]n multilayers prepared by rf-sputtering are studied. It is found that the decrease in the Gd layer thickness LGd leads to beginning of the structure transformation in Gd layers from the fine-crystalline to amorphous state when LGd becomes less than 2 nm. The Curie temperature TC decreases as a function of the Gd layer thickness in the same way as in early studied epitaxially grown Gd films, i.e. in case for which the finite-size effect plays most important role. A deviation of the TC(LGd) behaviour at very low LGd from the fit according to the finite-size law is probably caused by the island-like structure of the Gd layers.

2017 ◽  
Vol 7 (1) ◽  
Author(s):  
Cristian Mocuta ◽  
Daniel Bonamy ◽  
Stefan Stanescu ◽  
Souliman El Moussaoui ◽  
Antoine Barbier ◽  
...  

2009 ◽  
Vol 23 (19) ◽  
pp. 3895-3901 ◽  
Author(s):  
P. Z. SI ◽  
Z. D. ZHANG

Mn 2 O 3/ Mn 5 O 8 and MnO/Mn nanoparticles were prepared by annealing manganese nanoparticles in air and hydrogen, respectively. The antiferromagnetic Mn 2 O 3/ Mn 5 O 8 and MnO/Mn nanoparticles exhibit anomalous magnetic properties, such as large moments, and large coercivity of up to 169 kA/m and 105 kA/m, respectively. This ferromagnetic-like behavior is attributed to the finite size effect of antiferromagnetic nanoparticles and the presence of ferrimagnetic Mn 3 O 4 phases.


2008 ◽  
Vol 19 (19) ◽  
pp. 195706 ◽  
Author(s):  
G H Yue ◽  
P X Yan ◽  
L S Wang ◽  
W Wang ◽  
Y Z Chen ◽  
...  

2019 ◽  
Vol 172 ◽  
pp. 84-91 ◽  
Author(s):  
Darko Makovec ◽  
Matej Komelj ◽  
Goran Dražić ◽  
Blaž Belec ◽  
Tanja Goršak ◽  
...  

2018 ◽  
Vol 8 (5) ◽  
pp. 443-449
Author(s):  
Shoroog Alraddadi ◽  
William Hines ◽  
Genda Gu ◽  
Boris Sinkovic

2021 ◽  
Author(s):  
Amir H. Hakimioun ◽  
Elisabeth M. Dietze ◽  
Bart D. Vandegehuchte ◽  
Daniel Curulla-Ferre ◽  
Lennart Joos ◽  
...  

AbstractThis study evaluates the finite size effect on the oxygen adsorption energy of coinage metal (Cu, Ag and Au) cuboctahedral nanoparticles in the size range of 13 to 1415 atoms (0.7–3.5 nm in diameter). Trends in particle size effects are well described with single point calculations, in which the metal atoms are frozen in their bulk position and the oxygen atom is added in a location determined from periodic surface calculations. This is shown explicitly for Cu nanoparticles, for which full geometry optimization only leads to a constant offset between relaxed and unrelaxed adsorption energies that is independent of particle size. With increasing cluster size, the adsorption energy converges systematically to the limit of the (211) extended surface. The 55-atomic cluster is an outlier for all of the coinage metals and all three materials show similar behavior with respect to particle size. Graphic Abstract


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