ZIB

1

Electronic Resource

Evolution of structural order in germanium ion-implanted amorphous silicon layers (2002)

Cheng, S. L. ; Lin, H. H. ; He, J. H. ; [et al.]

[S.l.] : American Institute of Physics (AIP)

Journal of Applied Physics 92 (2002), S. 910-913

add to mindlist on the mindlist

Details

ISSN: 1089-7550

Source: AIP Digital Archive

Topics: Physics

Notes: High-resolution transmission electron microscopy in conjunction with autocorrelation function analysis have been applied to investigate the evolution of structural order in germanium ion-implanted amorphous silicon (a-Si) layers. A high density of Si nanocrystallites as small as 1 nm in size was detected in as-implanted a-Si layers. The density of embedded nanocrystalline Si was found to diminish in a-Si layers with annealing temperature first then increase. The results are discussed in the context of free energy change with annealing temperature. © 2002 American Institute of Physics.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1063/1.1486256

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

2

Electronic Resource

The enthalpy state of amorphous alloys in an immiscible system (2001)

He, J. H. ; Sheng, H. W. ; Ma, E.

Woodbury, NY : American Institute of Physics (AIP)

Applied Physics Letters 78 (2001), S. 1343-1345

add to mindlist on the mindlist

Details

ISSN: 1077-3118

Source: AIP Digital Archive

Topics: Physics

Notes: We performed calorimetric measurements of the enthalpy of formation of amorphous alloys created using vapor quenching in a highly immiscible system, Ag–Ni. The low-enthalpy states observed, as compared with extrapolated liquids and crystalline solid solutions, are in agreement with the findings from molecular dynamics (MD) simulations. The MD results support the proposition that the enthalpy reduction is associated with the ultra-fine-scale phase separation in the liquid/amorphous state. © 2001 American Institute of Physics.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1063/1.1352040

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

3

Electronic Resource

Extended x-ray absorption fine structure of metastable bcc and fcc phases in mechanically alloyed Fe–Cu (1996)

Schilling, P. J. ; He, J.-H. ; Cheng, J. ; [et al.]

Woodbury, NY : American Institute of Physics (AIP)

Applied Physics Letters 68 (1996), S. 767-769

add to mindlist on the mindlist

Details

ISSN: 1077-3118

Source: AIP Digital Archive

Topics: Physics

Notes: The extended x-ray absorption fine structure (EXAFS) technique has been employed to monitor the formation of thermodynamically unstable solid solutions induced by mechanical alloying in the positive heat of mixing Fe–Cu system. Local structural changes are clearly observed, with Cu taking on bcc coordination in the bcc (Fe80Cu20) solid solution, and Fe taking on fcc coordination in the fcc (Fe50Cu50) solid solution. Atomic level alloying is demonstrated through curve fitting to ab initio simulations. A difference is observed in the behavior of bcc and fcc ball milled samples, with a large reduction in first shell coordination number observed in bcc nanocrystalline structures (pure Fe and Fe80Cu20), but not in the fcc nanocrystalline structures (Fe50Cu50). This is believed to be due to the inability of the fcc structure to retain a high defect density. © 1996 American Institute of Physics.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1063/1.116736

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext