TY  - JOUR
A1  - Hagemann, Hans-Jürgen
A1  - Gudat, W.
A1  - Kunz, C.
T1  - Optical constants from the far infrared to the X-ray region: Mg, Al, Cu, Ag, Au, Bi, C, and Al₂O₃
JF  - Journal of the Optical Society of America (JOSA)
Y1  - 1975
SN  - 0030-3941
U6  - http://dx.doi.org/10.1364/JOSA.65.000742
VL  - 65
IS  - 6
SP  - 742
EP  - 744
PB  - Optical Society of America
CY  - New York
ER  - 
TY  - JOUR
A1  - Hagemann, Hans-Jürgen
A1  - Gudat, W.
A1  - Kunz, C.
T1  - Photoabsorption coefficient of alloys of Al with transition metals V, Fe, Ni and Cu and Pr from 30 to 150 eV photon energy
JF  - Physica status solidi b
N2  - The absorption coefficient of VAI3, FeAI, NiAI, NiAl2, CuAI2, PrAl2, and of disordered V–AI (16 at% AI, 28%, 41%) and Fe–AI (11%) alloys has been measured in the region of the M₂,₃ absorption of the transition metals and the Labsorption of AI. The strong changes of the AI spectrum in the region of the 100 eV maximum upon alloying are explained as another evidence of the EXAFS (extended X-ray absorption fine structure) nature of these structures. The broad, prominent absorption peaks from the 3p excitations in V and Fe and from the 4d excitations in Pr are influenced only little on allyoing and thus appear to be of atomic origin. The fine structure at the onset of the Pr 4d transitions is identical in the metal and the alloy but differs from that of Pr oxide. The only M₂,₃ edge which is detectably shifted is that of Ni (up to 2.1 eV), whereas the onset of the AI L₂,₃ edge is shifted in all the alloys (up to 1.1 eV). The shifts are interpreted in accordance with X-ray fluorescence and nuclear resonance measurements as changes of the density of states in the valence band of the alloys.
Y1  - 1976
SN  - 0031-8957
U6  - http://dx.doi.org/10.1002/pssb.2220740211
N1  - weitere ISSN 0370-1972
VL  - 74
IS  - 2
SP  - 507
EP  - 521
PB  - Wiley-VCH
CY  - Berlin
ER  - 
TY  - JOUR
A1  - Hagemann, Hans-Jürgen
T1  - Loss mechanisms and domain stabilization in doped BaTiO₃
JF  - Journal of Physics C: Solid State Physics
Y1  - 1978
SN  - 0022-3719
U6  - http://dx.doi.org/10.1088/0022-3719/11/15/031
VL  - 11
IS  - 15
SP  - 3333
EP  - 3344
PB  - n.a.
CY  - London
ER  - 
TY  - JOUR
A1  - Hagemann, Hans-Jürgen
T1  - Electrical properties of acceptor-doped BaTiO3 ceramic. Hagemann, H. J.
JF  - Berichte der Deutschen Keramischen Gesellschaft. 55 (1978)
Y1  - 1978
SN  - 0365-9542
SP  - 353
EP  - 355
ER  - 
TY  - JOUR
A1  - Hagemann, Hans-Jürgen
A1  - Geittner, P.
A1  - Mayr, W.
A1  - Opitz, J. F. A.
T1  - Folientechnologie für zukünftige keramische Vielschichtkondensatoren. Geittner, P.; Hagemann, H.-J.;Mayr, W. ; Opitz, J.F.A. ; Schmidl, B.;  Warnier, J.
JF  - Ceramic forum international : cfi ; Berichte der Deutschen Keramischen Gesellschaft. 8 (1993), H. 5
Y1  - 1993
SN  - 0173-9913
N1  - weitere ISSN 0196-6219
SP  - 5
EP  - 15
ER  - 
TY  - JOUR
A1  - Hagemann, Hans-Jürgen
T1  - Reduction of hysteresis losses of ferroelectric BaTiO3. Hagemann, H. J.
JF  - Ferroelectrics. 22 (1978)
Y1  - 1978
SN  - 0015-0193
SP  - 743
EP  - 743
ER  - 
TY  - JOUR
A1  - Hagemann, Hans-Jürgen
A1  - Ihrig, H.
T1  - Valence change and phase stability of 3d-doped BaTiO3 annealed in oxygen and hydrogen. Hagemann, H. J.; Ihrig, H.
JF  - Physical Review B.. 20 (1979), H. 9
Y1  - 1979
SN  - 1095-3795
SP  - 3871
EP  - 3878
ER  - 
TY  - JOUR
A1  - Hagemann, Hans-Jürgen
A1  - Geittner, P.
A1  - Leers, D.
T1  - Intrinsic scattering and absorption losses of Ge- and F-doped optical fibres prepared by PCVD. Geittner, P.; Hagemann, H. J. ; Leers, D.
JF  - Electronics letters : an intern. publication / The Institution of Electrical Engineers. 25 (1989), H. 7
Y1  - 1989
SN  - 0013-5194
SP  - 436
EP  - 437
ER  - 
TY  - JOUR
A1  - Hagemann, Hans-Jürgen
A1  - Geittner, P.
A1  - Warnier, J.
A1  - Wilson, H.
T1  - PCVD at high deposition rates. Geittner, P.; Hagemann, H. J.; Warnier, J.; Wilson, H.
JF  - Journal of Lightwave Technology (J-LT) / Institute of Electrical and Electronics Engineers (IEEE). 4 (1986), H. 7
Y1  - 1986
SN  - 0733-8724
SP  - 818
EP  - 822
ER  - 
TY  - JOUR
A1  - Hagemann, Hans-Jürgen
A1  - Geittner, P.
A1  - Lydtin, H.
A1  - Warnier, J.
T1  - Hybrid technology for large SM-fiber preforms. Geittner, P.; Hagemann, H. J.; Lydtin, H.; Warnier, J.
JF  - Journal of Lightwave Technology (J-LT) / Institute of Electrical and Electronics Engineers (IEEE). 6 (1988), H. 10
Y1  - 1988
SN  - 0733-8724
SP  - 1451
EP  - 1454
ER  -