Limits...
Generating and measuring the anisotropic elastic behaviour of Co thin films with oriented surface nano-strings on micro-cantilevers.

Madurga V, Vergara J, Favieres C - Nanoscale Res Lett (2011)

Bottom Line: The anisotropic elastic behaviour of these Co films was determined by measuring the changes that took place in the resonant frequency of each micro-cantilever after this process of creating differently oriented plasma coatings had been completed.This differential procedure allowed us to determine the difference between the Young's modulus of the different films based on the different direction of the nano-strings.This difference was determined to be, at least, the 20% of the Young's modulus of the bulk Co.PACS: 62.25.-g; 81.16.Rf; 68.60.Bs; 81.15.Fg; 68.37.Ef; 85.85.+j.

View Article: PubMed Central - HTML - PubMed

Affiliation: Laboratory of Magnetism, Department of Physics, Public University of Navarre, Campus Arrosadía s/n, Pamplona 31006, Spain. vmadurga@unavarra.es.

ABSTRACT
In this research, the elastic behaviour of two Co thin films simultaneously deposited in an off-normal angle method was studied. Towards this end, two Si micro-cantilevers were simultaneously coated using pulsed laser deposition at an oblique angle, creating a Co nano-string surface morphology with a predetermined orientation. The selected position of each micro-cantilever during the coating process created longitudinal or transverse nano-strings. The anisotropic elastic behaviour of these Co films was determined by measuring the changes that took place in the resonant frequency of each micro-cantilever after this process of creating differently oriented plasma coatings had been completed. This differential procedure allowed us to determine the difference between the Young's modulus of the different films based on the different direction of the nano-strings. This difference was determined to be, at least, the 20% of the Young's modulus of the bulk Co.PACS: 62.25.-g; 81.16.Rf; 68.60.Bs; 81.15.Fg; 68.37.Ef; 85.85.+j.

No MeSH data available.


Related in: MedlinePlus

Evolution of the ratio ν2(C-MCL)/νo2 with a consecutive Co deposition time of 15 s. This ratio is shown for both the PA-MCL and the PE-MCL. The percolation in the deposited Co over the MCLs was deduced for a total deposition time of ≈1.2 to 1.4 min when ν2(C-MCL)/νo2 changed its slope.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
getmorefigures.php?uid=PMC3211413&req=5

Figure 5: Evolution of the ratio ν2(C-MCL)/νo2 with a consecutive Co deposition time of 15 s. This ratio is shown for both the PA-MCL and the PE-MCL. The percolation in the deposited Co over the MCLs was deduced for a total deposition time of ≈1.2 to 1.4 min when ν2(C-MCL)/νo2 changed its slope.

Mentions: Figure 5 shows the changes in the ratio ν2(C-MCL)/νo2 with consecutive Co deposition times of 15 s. Ratios are displayed for both the PA-MCL and the PE-MCL. These results indicate that there is no difference between the PA- and PE-MCL with regard to these parameters until ≈1.0 min and that the same decrease occurs for both with time. The lack of difference may stem from the equal mass deposited on both MCLs and the equal k0 spring constants for both MCLs. No film was formed, only islands of Co were present and no change of the k0 of each MCL took place. After percolation, after ≈1.2-1.4 min of deposition, the slope of the ratio ν2(C-MCL)/νo2 versus the deposition time, changed. The decrease in ν2(C-MCL)/νo2 produced by the increase in m was balanced out by the increase in k produced by the percolated film. Because the same quantity of material was deposited on the two simultaneously coated MCLs, the division of the value of ν2(C-MCL)/νo2 (starting at approximately 2.0 min) must has been a result of the newly generated nano-strings, which produced different values of k for each MCL. In fact, the coated PE-MCL with longitudinal nano-strings exhibited a value of k higher than the corresponding value for the coated PA-MCL with transverse nano-strings.


Generating and measuring the anisotropic elastic behaviour of Co thin films with oriented surface nano-strings on micro-cantilevers.

Madurga V, Vergara J, Favieres C - Nanoscale Res Lett (2011)

Evolution of the ratio ν2(C-MCL)/νo2 with a consecutive Co deposition time of 15 s. This ratio is shown for both the PA-MCL and the PE-MCL. The percolation in the deposited Co over the MCLs was deduced for a total deposition time of ≈1.2 to 1.4 min when ν2(C-MCL)/νo2 changed its slope.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3211413&req=5

Figure 5: Evolution of the ratio ν2(C-MCL)/νo2 with a consecutive Co deposition time of 15 s. This ratio is shown for both the PA-MCL and the PE-MCL. The percolation in the deposited Co over the MCLs was deduced for a total deposition time of ≈1.2 to 1.4 min when ν2(C-MCL)/νo2 changed its slope.
Mentions: Figure 5 shows the changes in the ratio ν2(C-MCL)/νo2 with consecutive Co deposition times of 15 s. Ratios are displayed for both the PA-MCL and the PE-MCL. These results indicate that there is no difference between the PA- and PE-MCL with regard to these parameters until ≈1.0 min and that the same decrease occurs for both with time. The lack of difference may stem from the equal mass deposited on both MCLs and the equal k0 spring constants for both MCLs. No film was formed, only islands of Co were present and no change of the k0 of each MCL took place. After percolation, after ≈1.2-1.4 min of deposition, the slope of the ratio ν2(C-MCL)/νo2 versus the deposition time, changed. The decrease in ν2(C-MCL)/νo2 produced by the increase in m was balanced out by the increase in k produced by the percolated film. Because the same quantity of material was deposited on the two simultaneously coated MCLs, the division of the value of ν2(C-MCL)/νo2 (starting at approximately 2.0 min) must has been a result of the newly generated nano-strings, which produced different values of k for each MCL. In fact, the coated PE-MCL with longitudinal nano-strings exhibited a value of k higher than the corresponding value for the coated PA-MCL with transverse nano-strings.

Bottom Line: The anisotropic elastic behaviour of these Co films was determined by measuring the changes that took place in the resonant frequency of each micro-cantilever after this process of creating differently oriented plasma coatings had been completed.This differential procedure allowed us to determine the difference between the Young's modulus of the different films based on the different direction of the nano-strings.This difference was determined to be, at least, the 20% of the Young's modulus of the bulk Co.PACS: 62.25.-g; 81.16.Rf; 68.60.Bs; 81.15.Fg; 68.37.Ef; 85.85.+j.

View Article: PubMed Central - HTML - PubMed

Affiliation: Laboratory of Magnetism, Department of Physics, Public University of Navarre, Campus Arrosadía s/n, Pamplona 31006, Spain. vmadurga@unavarra.es.

ABSTRACT
In this research, the elastic behaviour of two Co thin films simultaneously deposited in an off-normal angle method was studied. Towards this end, two Si micro-cantilevers were simultaneously coated using pulsed laser deposition at an oblique angle, creating a Co nano-string surface morphology with a predetermined orientation. The selected position of each micro-cantilever during the coating process created longitudinal or transverse nano-strings. The anisotropic elastic behaviour of these Co films was determined by measuring the changes that took place in the resonant frequency of each micro-cantilever after this process of creating differently oriented plasma coatings had been completed. This differential procedure allowed us to determine the difference between the Young's modulus of the different films based on the different direction of the nano-strings. This difference was determined to be, at least, the 20% of the Young's modulus of the bulk Co.PACS: 62.25.-g; 81.16.Rf; 68.60.Bs; 81.15.Fg; 68.37.Ef; 85.85.+j.

No MeSH data available.


Related in: MedlinePlus