TITLE

Effect of initial stress/strain state on order-disorder transformation of FePt thin films

AUTHOR(S)
Hsiao, S. N.; Yuan, F. T.; Chang, H. W.; Huang, H. W.; Chen, S. K.; Lee, H. Y.
PUB. DATE
June 2009
SOURCE
Applied Physics Letters;6/8/2009, Vol. 94 Issue 23, p232505
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Initial stress (σi) of a room-temperature deposited FePt films was manipulated to study the order-disorder transformation. We observed that, while σi was increased from -1.01 (compressive) to 0.18 GPa (tensile), the phase transformation activation energy decreased from 0.387 to 0.23 eV/atom. This causes a reduction in ordering temperature of about 100 °C. We also found that densification induces an increase in tensile stress of about 1 GPa before ordering. In the films with small σi, strong tension facilitates the nucleation of L10 FePt; however, if highly compressive σi cancels the densification tension, ordering is retarded causing higher ordering temperature.
ACCESSION #
41573028

 

Related Articles

  • Direct evidence for stress-induced (001) anisotropy of rapid-annealed FePt thin films. Hsiao, S. N.; Liu, S. H.; Chen, S. K.; Chin, T. S.; Lee, H. Y. // Applied Physics Letters;6/25/2012, Vol. 100 Issue 26, p261909 

    Roles of rapid thermal annealing (RTA) on the evolution of crystallographic anisotropy of single-layered FePt films have been characterized. We observed a huge biaxial tensile stress of 2.18 GPa induced with increasing heating rate from 0.5 to 40 K/s. The result is a transition of orientation...

  • Phase control through anisotropic strain in Nd0.5Sr0.5MnO3 thin films. Nakamura, Masao; Ogimoto, Yasushi; Tamaru, Hiroharu; Izumi, Makoto; Miyano, Kenjiro // Applied Physics Letters;5/2/2005, Vol. 86 Issue 18, p182504 

    Strain effect in charge- and orbital-ordered state has been investigated for Nd0.5Sr0.5MnO3 thin films deposited on (100), (110), and (111)-oriented substrates of SrTiO3. Films on (001) and (111) substrates have a monotonous temperature dependence for magnetic and transport properties showing no...

  • Metal-semiconductor phase transition in transplanted thin polycrystalline vanadium dioxide films. Andreev, V.; Klimov, V.; Kompan, M. // Technical Physics Letters;Jun2013, Vol. 39 Issue 6, p566 

    A method for transfer of vanadium dioxide films from one substrate to another is proposed. This transplantation reveals a significant influence of elastic stresses arising during the film synthesis and as a result of the structural phase transition in the film on the temperature and shape of...

  • Pseudomorphic strain induced strong anisotropic magnetoresistance over a wide temperature range in epitaxial La0.67Ca0.33MnO3/NdGaO3(001) films. Wang, L. F.; Huang, Z.; Tan, X. L.; Chen, P. F.; Zhi, B. W.; Li, G. M.; Wu, W. B. // Applied Physics Letters;12/13/2010, Vol. 97 Issue 24, p242507 

    Strong anisotropic magnetoresistance (AMR) was observed in La0.67Ca0.33MnO3 films grown coherently on the orthorhombic NdGaO3(001) substrates. With an increased orthorhombic lattice distortion due to the pseudomorphic strain, the films show not only a ferromagnetic-metal (FM) transition at TC of...

  • Structure of domain boundaries with spin-reorientation phase transitions in ferrite-garnet films with a weak uniaxial anisotropy. Mamalui, Ju. A.; Siryuk, Ju. A.; Bezus, A. V. // Low Temperature Physics;Feb2011, Vol. 37 Issue 2, p120 

    The equilibrium domain structure in ferrite-garnet films with a weak uniaxial anisotropy is studied experimentally at temperatures of 90-450 K. Two types of spin-reorientation phase transitions are found which occur on opposite sides of the magnetic compensation temperature. The change in the...

  • High-throughput combinatorial study of local stress in thin film composition spreads. Woo, Noble C.; Ng, Bryan G.; van Dover, R. Bruce // Review of Scientific Instruments;Jul2007, Vol. 78 Issue 7, p072208 

    We investigate the stresses in thin films with sub-millimeter lateral spatial resolution using a dense array of prefabricated cantilever beams prepared by microelectromechanical-system techniques. Stress induced deflection of the cantilever is interrogated by an optical (laser/position sensitive...

  • Deflection of a substrate induced by an anisotropic thin-film stress. van de Riet, E. // Journal of Applied Physics;7/1/1994, Vol. 76 Issue 1, p584 

    Presents a study which theoretically examined the deflection of a substrate caused by an anisotropic stress in a thin film that is deposited on it. Solution of the elastic equations for the cantilever problem; Equations for the deflection caused by anisotropic stresses; Comparison between these...

  • Magnetoelastic coupling in Ni and Fe monolayers on Cu(001). Gutjahr-Lo¨ser, Th.; Sander, D.; Kirschner, J. // Journal of Applied Physics;5/1/2000, Vol. 87 Issue 9, p5920 

    The correlation between mechanical stress and magnetic anisotropy of Ni and Fe films on Cu(001) is investigated. The magnetoelastic coupling and the film stress during the growth are measured in situ with a highly sensitive optical bending beam technique. For Ni a dramatically reduced...

  • Effect of anisotropy on the excess stress and critical thickness of capped Si1-xGex strained layers. Shintani, K.; Fujita, K. // Journal of Applied Physics;6/15/1994, Vol. 75 Issue 12, p7842 

    Presents a study which assessed the effect of anisotropy on the excess stress and critical thickness of capped Si[sub1-x]Ge[subx] strained layers. Information on the excess stress of dislocations in anisotropic capped strained layers; Results of the study; Conclusion.

Share

Read the Article

Courtesy of VIRGINIA BEACH PUBLIC LIBRARY AND SYSTEM

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics