In:
Applied Physics Letters, AIP Publishing, Vol. 74, No. 23 ( 1999-06-07), p. 3504-3506
Abstract:
The ultrasonic velocity (V) and attenuation (α) have been measured for both longitudinal and transverse waves in the single-phase polycrystalline colossal-magnetoresistance compound La0.67Ca0.33MnO3 near the Curie temperature Tc. A dramatic increase in V is observed at the ferromagnetic transition temperature and accompanied by a sharp peak in α for both longitudinal and transverse waves. This simultaneous occurrence of magnetic, transport, and lattice anomalous features implies extremely strong spin–phonon and electron–phonon interaction, and gives direct evidence for the spontaneous linear magnetostriction effect. The longitudinal attenuation (αI) was carefully measured over a wide temperature range. The temperature dependence of critical attenuation is given by (T−Tc)−1.55 for T & gt;Tc.
Type of Medium:
Online Resource
ISSN:
0003-6951
,
1077-3118
Language:
English
Publisher:
AIP Publishing
Publication Date:
1999
detail.hit.zdb_id:
211245-0
detail.hit.zdb_id:
1469436-0
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