Antiferromagnetic resonance in charge ordering state of Pr0.5Ca0.5MnO3−δ single crystal

2001 ◽  
Vol 226-230 ◽  
pp. 854-856 ◽  
Author(s):  
S Kawamata ◽  
S Noguchi ◽  
K Okuda ◽  
H Nojiri ◽  
M Motokawa
Keyword(s):  
Single Crystal ◽  
Charge Ordering ◽  
Antiferromagnetic Resonance

Antiferromagnetic resonance in CuB2O4 single crystal

2000 ◽  
Vol 42 (1) ◽  
pp. 96-102 ◽  
Author(s):  
A. I. Pankrats ◽  
G. A. Petrakovskii ◽  
N. V. Volkov
Keyword(s):  
Single Crystal ◽  
Antiferromagnetic Resonance

Antiferromagnetic Resonance in Mn2P2O7

1972 ◽  
Vol 50 (21) ◽  
pp. 2681-2687 ◽  
Author(s):  
D. C. Fowlis ◽  
C. V. Stager
Keyword(s):  
Single Crystal ◽  
Antiferromagnetic Resonance ◽  
Extended Theory ◽  
Temperature Range ◽  
Made In

Antiferromagnetic resonance has been observed in single crystal samples of Mn2P2O7. Measurements were made in narrow frequency ranges at 35 and 70 GHz over a temperature range from 1.2 to 14 °K. The results could not be fitted to the Nagamiya–Yosida theory. The results are compared with an extended theory due to Date.

Charge ordering and the related structural phase transition in single-crystal(Bi0.24Ca0.76)MnO3

1999 ◽  
Vol 59 (18) ◽  
pp. 11687-11692 ◽  
Author(s):  
Y. Su ◽  
C-H. Du ◽  
P. D. Hatton ◽  
S. P. Collins ◽  
S-W. Cheong
Keyword(s):  
Phase Transition ◽  
Single Crystal ◽  
Structural Phase Transition ◽  
Structural Phase ◽  
Charge Ordering

X-ray diffraction single-crystal structure characterization of iron ludwigite from room temperature to 15 K

2006 ◽  
Vol 39 (1) ◽  
pp. 42-45 ◽  
Author(s):  
M. Mir ◽  
Jan Janczak ◽  
Y. P. Mascarenhas
Keyword(s):  
Single Crystal ◽  
Room Temperature ◽  
Structural Characteristics ◽  
Density Wave ◽  
Charge Ordering ◽  
Structure Characterization ◽  
Dimensional Structure ◽  
X Ray ◽  
Extra Electron ◽  
A Charge

Iron ludwigite exhibits a superstructure between 283 and 144 K. Anomalies in its transport properties are due to a structural transition related to a charge-ordering phenomenon in the low-dimensional structure. This ordering produces a commensurate transversal charge density wave in the system. To understand these structural characteristics, an X-ray single-crystal diffraction study has been performed at 300 and 15 K. No changes were found in the crystalline structure, except for contraction of the cell volume. The bond-valence sum for each cation shows that at room temperature each Fe4—Fe2—Fe4 triad is composed of three Fe3+ions with one extra electron per triad, and at 15 K in each Fe4a—Fe2—Fe4btriad the extra electron is accommodated in the Fe4a—Fe2 pair of each triad.

Antiferromagnetic resonance in Europium telluride single crystal

1971 ◽  
Vol 9 (10) ◽  
pp. 713-716 ◽  
Author(s):  
Jun Nakai ◽  
Satoru Kunii ◽  
Eiji Hirahara
Keyword(s):  
Single Crystal ◽  
Antiferromagnetic Resonance ◽  
Europium Telluride

Commensurate-incommensurate phase transition in charge ordered La1-xCaxMnO3 by single crystal diffraction and electron imaging

2002 ◽  
Vol 755 ◽  
Author(s):  
Jing Tao ◽  
Y Murakami ◽  
Jian-min Zuo
Keyword(s):  
Phase Transition ◽  
Single Crystal ◽  
Melting Process ◽  
Real Space ◽  
Charge Ordering ◽  
Space Images ◽  
The Real ◽  
Incommensurate Structure ◽  
Increasing Temperature ◽  
Electron Imaging

ABSTRACTElectron nanodiffraction from single crystal domain of La1-xCaxMnO3 with 0.5 ≤ × ≤ 0.8 is carried out to study the charge ordering phase transition in this system. The melting processes of charge ordering structure in samples with x = 1/2, 2/3 and 4/5 are observed in-situ by increasing temperature from 93K – 298K. During the phase transition, electron diffraction results show that the nearly commensurate low-temperature charge ordering structure continuously evolves to incommensurate structure with directly decreasing sizes of charge ordered area. The picture of this phase transition is confirmed by the real space imaging. The real space images clearly show the introduction of charge ordering defects during the melting process in this sample.

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