Universal relationship between sample dimensions and cooperative phenomena: Effects of fractal dimension on electronic properties of high-TC cuprate observed using electron spin resonance

2021 ◽  
Author(s):  
Toshio Naito ◽  
Yoshiaki Fukuda
Keyword(s):  
Fractal Dimension ◽  
Electron Spin Resonance ◽  
Electronic Properties ◽  
Nanostructured Materials ◽  
Electron Spin ◽  
Bulk Properties ◽  
High Tc ◽  
Cooperative Phenomena ◽  
Spin Resonance ◽  
Universal Relationship

As demonstrated by the unique electronic properties of nanostructured materials, which are qualitatively different from the bulk properties of the same materials, there should be general relationship between dimensions of...

MICROWAVE ABSORPTION STUDIES ON HIGH-Tc SUPERCONDUCTORS AND RELATED MATERIALS III: Electron Spin Resonance Studies of Y2Ba1Cu1O5 and Gd2Ba1Cu1O5

1991 ◽  
Vol 05 (13) ◽  
pp. 895-901 ◽  
Author(s):  
K. SUGAWARA ◽  
D. J. BAAR ◽  
Y. SHIOHARA ◽  
S. TANAKA
Keyword(s):  
Electron Spin Resonance ◽  
Microwave Absorption ◽  
Electron Spin ◽  
Room Temperature ◽  
Magnetic Ordering ◽  
High Tc Superconductors ◽  
Néel Temperature ◽  
High Tc ◽  
Spin Resonance ◽  
Absorption Studies

The ESR of Cu 2+ and Gd 3+ ion in Y 2 Ba 1 Cu 1 O 5 and Gd 2 Ba 1 Cu 1 O 5 has been studied at temperatures from 4 K to room temperature. Particular emphasis has been paid to the ESR linewidths (∆H PP ) and g-values of the ions. The ∆H PP and g-values for Y 2 Ba 1 Cu 1 O 5 were found to have anomalous increments near 15 K, close to the Néel temperature of Y 2 Ba 1 Cu 1 O 5. Similarly, ∆H PP for Gd 2 Ba 1 Cu 1 O 5 had peaks near 12 K. Our analysis reveals that the ESR signal from Gd 2 Ba 1 Cu 1 O 5 is dominated by the Gd 3+ ESR. However, the magnetic ordering may be caused by both Gd-Gd and Gd-Cu interactions.

Sign in / Sign up

Export Citation Format

Share Document