APL Nameplate
  • Volume/Page
  • Keyword
  • DOI
  • Citation
  • Advanced
   
 
 
 

Flickr Twitter iResearch App Facebook

BROWSE VOLUMES

Year Range: 
Search Issue | RSS Feeds RSS
Next Issue

5 Jul 2010

Volume 97, Issue 1, Articles (01xxxx)

Issue Cover Spotlight Figure

Appl. Phys. Lett. 97, 013301 (2010); http://dx.doi.org/10.1063/1.3458867 (3 pages)

M. Uno, Y. Hirose, T. Uemura, K. Takimiya, Y. Nakazawa, and J. Takeya
Enlarge Image | Read More
Return to All Sections
back to top
RSS Feeds

Hysteresis and unusual magnetic properties in the singular Heusler alloy Ni45Co5Mn40Sn10

Vijay Srivastava, Xian Chen, and Richard D. James

Appl. Phys. Lett. 97, 014101 (2010); http://dx.doi.org/10.1063/1.3456562 (3 pages) | Cited 10 times

Online Publication Date: 6 July 2010

Full Text: Read Online (HTML) | Download PDF

Show Abstract
The alloy Ni45Co5Mn40Sn10 is shown to be singular relative to nearby alloys in three following ways: (1) The austenite has remarkably high magnetization (1170 emu/cm3) and low magnetic anisotropy. (2) The thermal hysteresis is near minimum. (3) The transformation temperature ∼ 135 °C is unusually high. Because the unusually large magnetization and low hysteresis is seen at relatively small applied fields, applications such as magnetic shape memory, energy conversion, and solid state refrigeration may become practical.
Show PACS
75.60.Ej Magnetization curves, hysteresis, Barkhausen and related effects
75.30.Gw Magnetic anisotropy
75.30.Sg Magnetocaloric effect, magnetic cooling
75.50.Cc Other ferromagnetic metals and alloys

Finite element simulation for ultraviolet excimer laser processing of patterned Si/SiGe/Si(100) heterostructures

J. C. Conde, E. Martín, S. Chiussi, F. Gontad, C. Serra, and P. González

Appl. Phys. Lett. 97, 014102 (2010); http://dx.doi.org/10.1063/1.3452341 (3 pages) | Cited 4 times

Online Publication Date: 7 July 2010

Full Text: Read Online (HTML) | Download PDF

Show Abstract
Ultraviolet (UV) Excimer laser assisted processing is an alternative strategy for producing patterned silicon germanium heterostructures. We numerically analyzed the effects caused by pulsed 193 Excimer laser radiation impinging on patterned amorphous hydrogenated silicon (a-Si:H) and germanium (a-Ge:H) bilayers deposited on a crystalline silicon substrate [Si(100)]. The proposed two dimensional axisymmetric numerical model allowed us to estimate the temperature and concentration gradients caused by the laser induced rapid melting and solidification processes. Energy density dependence of maximum melting depth and melting time evolution as well as three dimensional temperature and element distribution have been simulated and compared with experimentally obtained results.
Show PACS
42.62.-b Laser applications
61.80.Ba Ultraviolet, visible, and infrared radiation effects (including laser radiation)
64.70.dj Melting of specific substances
02.70.Dh Finite-element and Galerkin methods
81.30.Fb Solidification
61.82.Fk Semiconductors

Elastocapillary fabrication of three-dimensional microstructures

J. W. van Honschoten, J. W. Berenschot, T. Ondarçuhu, R. G. P. Sanders, J. Sundaram, M. Elwenspoek, and N. R. Tas

Appl. Phys. Lett. 97, 014103 (2010); http://dx.doi.org/10.1063/1.3462302 (3 pages) | Cited 6 times

Online Publication Date: 9 July 2010

Full Text: Read Online (HTML) | Download PDF

Show Abstract
We describe the fabrication of three-dimensional microstructures by means of capillary forces. Using an origami-like technique, planar silicon nitride structures of various geometries are folded to produce three-dimensional objects of 50–100 μm. Capillarity is a particularly effective mechanism since surface tension forces dominate over bulk forces at small scales. The spontaneous evaporation of water forms the driving mechanism for this microfabrication technique. Therefore the actuating liquid disappears in the final structure. A model describing the elastocapillary interaction of the folding process is compared with experiments. By tailoring the elastic and capillary properties a variety of three-dimensional micro-objects can be realized.
Show PACS
68.03.Cd Surface tension and related phenomena
62.20.D- Elasticity
81.16.-c Methods of micro- and nanofabrication and processing

Piezoelectric conversion and energy harvesting enhancement by initial energy injection

Mickaël Lallart and Daniel Guyomar

Appl. Phys. Lett. 97, 014104 (2010); http://dx.doi.org/10.1063/1.3462304 (3 pages) | Cited 7 times

Online Publication Date: 9 July 2010

Full Text: Read Online (HTML) | Download PDF

Show Abstract
This letter reports a concept for enhancing the conversion abilities of piezoelectric materials based on initial energy injection, as well as its application to energy harvesting. Unlike conventional energy conversion approaches, this concept considers a pulsed bidirectional energy flow between the source and the storage stages. The presented technique shows an “energy resonance” effect that can bring up the gain in terms of harvested energy up to 40 (20 using typical components) compared to standard energy harvesting methods. Such a system thus allows a significant reduction in active materials required for the conception of autonomous devices supplied by ambient energy.
Show PACS
84.60.-h Direct energy conversion and storage
Return to All Sections
Close

Google Calendar

ADVERTISEMENT

Go to AIP Home   © AIP Publishing LLC
close