Paul-Drude-Institut -Phase transitions

Order-disorder phenomena and phase transitions

The physical properties of ferromagnetic Heusler alloys or semiconducting oxide layers, for example, depend on their structural order and phase stability. The underlying physical principles of phase stabilities and phase transformation processes are explored with high spatial and temporal resolution in dependence on internal parameters like chemical composition and strain state as well as external parameters given by temperature and growth kinetics. The degree of order/disorder and their spatial distribution within thin ﬁlms are determined quantitatively by in-situ and ex-situ X-ray diﬀraction and electron microscopy methods.

Our research is currently focused on the following topics:

Ordering phenomena and phase transitions in metastable Ge-Fe alloys
Structural phase transition in epitaxial semiconducting oxides
In-situ x-ray diffraction PHARAO and in-situ transmission electron microscopy studies on phase transitions

Selected Publications

5	Author	M. Terker , B. Jenichen , J. Herfort , A. Trampert
	Title	In-situ transmission electron microscopy of solid phase epitaxy of Ge on Fe3Si
	Source	Semicond. Sci. Technol. , 34 , 124004 ( 2019 )
DOI : 10.1088/1361-6641/ab4fad \| 3148 Cite : Bibtex RIS @article{ author = { M. Terker and B. Jenichen and J. Herfort and A. Trampert }, title = { In-situ transmission electron microscopy of solid phase epitaxy of Ge on Fe3Si }, journal = { Semiconductor Science and Technology }, volume = { 34 }, year = { 2019 }, pages = { 124004 } } M. Terker, B. Jenichen, J. Herfort, and A. Trampert TY - JOUR AU - M. Terker AU - B. Jenichen AU - J. Herfort AU - A. Trampert TI - In-situ transmission electron microscopy of solid phase epitaxy of Ge on Fe3Si JF - Semiconductor Science and Technology JA - Semicond. Sci. Technol. J1 - SST VL - 34 SP - 124004 PY - 2019/11/15

4	Author	K. Berlin , A. Trampert
	Title	Phase Stability and Anisotropic Sublimation of Cubic Ge−Sb−Te Alloy Observed by In Situ Transmission Electron Microscopy
	Source	J. Phys. Chem. C , 122 , 2968 ( 2018 )
DOI : 10.1021/acs.jpcc.7b09855 \| 3061 Cite : Bibtex RIS @article{ author = { K. Berlin and A. Trampert }, title = { Phase Stability and Anisotropic Sublimation of Cubic Ge−Sb−Te Alloy Observed by In Situ Transmission Electron Microscopy }, journal = { Journal of Physical Chemistry C }, volume = { 122 }, year = { 2018 }, pages = { 2968 } } K. Berlin, and A. Trampert TY - JOUR AU - K. Berlin AU - A. Trampert TI - Phase Stability and Anisotropic Sublimation of Cubic Ge−Sb−Te Alloy Observed by In Situ Transmission Electron Microscopy JF - Journal of Physical Chemistry C JA - J. Phys. Chem. C J1 - VL - 122 SP - 2968 PY - 2018/01/01

3	Author	B. Jenichen , M. Hanke , S. Gaucher , A. Trampert , J. Herfort , H. Kirmse , B. Haas , E. Willinger , X. Huang , S. C. Erwin
	Title	Ordered structure of FeGe2 formed during solid-phase epitaxy
	Source	Phys. Rev. Mater. , 2 , 051402 ( 2018 )
DOI : 10.1103/PhysRevMaterials.2.051402 \| 3025 Cite : Bibtex RIS @article{ author = { B. Jenichen and M. Hanke and S. Gaucher and A. Trampert and J. Herfort and H. Kirmse and B. Haas and E. Willinger and X. Huang and S. C. Erwin }, title = { Ordered structure of FeGe2 formed during solid-phase epitaxy }, journal = { Physical Review Materials }, volume = { 2 }, year = { 2018 }, pages = { 051402 } } B. Jenichen, M. Hanke, S. Gaucher, A. Trampert, J. Herfort, H. Kirmse, B. Haas, E. Willinger, X. Huang, and S. C. Erwin TY - JOUR AU - B. Jenichen AU - M. Hanke AU - S. Gaucher AU - A. Trampert AU - J. Herfort AU - H. Kirmse AU - B. Haas AU - E. Willinger AU - X. Huang AU - S. C. Erwin TI - Ordered structure of FeGe2 formed during solid-phase epitaxy JF - Physical Review Materials JA - Phys. Rev. Mater. J1 - VL - 2 SP - 051402 PY - 2018/05/21

2	Author	Z. Cheng , M. Hanke , P. Vogt , O. Bierwagen , A. Trampert
	Title	Phase formation and strain relaxation of Ga2O3 on various sapphire orientations as studied by synchrotron-based x-ray diffraction
	Source	Appl. Phys. Lett. , 111 , 162104 ( 2017 )
DOI : 10.1063/1.4998804 \| Download: PDF \| 2948 Cite : Bibtex RIS @article{ author = { Z. Cheng and M. Hanke and P. Vogt and O. Bierwagen and A. Trampert }, title = { Phase formation and strain relaxation of Ga2O3 on various sapphire orientations as studied by synchrotron-based x-ray diffraction }, journal = { Applied Physics Letters }, volume = { 111 }, year = { 2017 }, pages = { 162104 } } Z. Cheng, M. Hanke, P. Vogt, O. Bierwagen, and A. Trampert TY - JOUR AU - Z. Cheng AU - M. Hanke AU - P. Vogt AU - O. Bierwagen AU - A. Trampert TI - Phase formation and strain relaxation of Ga2O3 on various sapphire orientations as studied by synchrotron-based x-ray diffraction JF - Applied Physics Letters JA - Appl. Phys. Lett. J1 - APL VL - 111 SP - 162104 PY - 2017/10/16

1	Author	K. Berlin , A. Trampert
	Title	Liquid-solid phase transition of Ge-Sb-Te alloy observed by in-situ transmission electron microscopy
	Source	Ultramicroscopy , 178 , 27 ( 2017 )
DOI : 10.1016/j.ultramic.2016.10.010 \| 2883 Cite : Bibtex RIS @article{ author = { K. Berlin and A. Trampert }, title = { Liquid-solid phase transition of Ge-Sb-Te alloy observed by in-situ transmission electron microscopy }, journal = { Ultramicroscopy }, volume = { 178 }, year = { 2017 }, pages = { 27 } } K. Berlin, and A. Trampert TY - JOUR AU - K. Berlin AU - A. Trampert TI - Liquid-solid phase transition of Ge-Sb-Te alloy observed by in-situ transmission electron microscopy JF - Ultramicroscopy JA - Ultramicroscopy J1 - UlMi VL - 178 SP - 27 PY - 2017/07/01

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Order-disorder phenomena and phase transitions

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