Sound velocity anomaly at around X approximate to 1/8 in La1-xCaxMnO3

Citation
H. Fujishiro et al., Sound velocity anomaly at around X approximate to 1/8 in La1-xCaxMnO3, J PHYS JPN, 68(5), 1999, pp. 1469-1472
Citations number
15
Language
INGLESE
art.tipo
Letter
Categorie Soggetti
Physics
Journal title
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
ISSN journal
0031-9015 → ACNP
Volume
68
Issue
5
Year of publication
1999
Pages
1469 - 1472
Database
ISI
SICI code
0031-9015(199905)68:5<1469:SVAAAX>2.0.ZU;2-X
Abstract
The sound velocity v(s)(T) of La1-xCaxMnO3 (0.08 less than or equal to X le ss than or equal to 0.30) has been measured and two types of v(s)(T) anomal ies have been observed. One is the v(s)(T) minimum around the ferromagnetic transition temperature T-c, and the other is the v(s)(T) upturn below the characteristic temperature T* which is lower than T-c. T*, as a function of the Ca concentration X, shows a maximum at about X = 1/8 and may be relate d to the onset of the charge-ordered phase similar to the v(s)(T) anomalies in La1-xSrxMnO3.