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Ultrasonic and magnetic studies of Nd0.5Sr0.5MnO3

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UNSPECIFIED (2000) Ultrasonic and magnetic studies of Nd0.5Sr0.5MnO3. PHYSICAL REVIEW B, 62 (10). R6104-R6107. ISSN 0163-1829.

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Abstract

The results of systematic ultrasonic and magnetic studies of the magnetoresistive compound Nd0.5Sr0.5MnO3 are reported. With decreasing temperature the pronounced acoustic-mode hardening was observed at about T-CO= 145 K. The significant softening of the acoustic mode was observed in the vicinity of the insulator-to-metal transition induced by magnetic field. The T-B phase diagram was obtained from the ultrasonic measurements. The change of sound velocity around T-CO was explained by a strong coupling between the acoustic phonons and the CD states. The peculiarities of the sound propagation at the phase transition can be attributed to the phase segregation in the ground state in Nd0.5Sr0.5MnO3. An enhancement in magnetic correlations at temperatures below 20 K, as seen by magnetization and ultrasound measurements, was observed in Nd0.5Sr0.5MnO3. We discuss this effect in terms of possible short-range magnetic ordering on the rare-earth sublattice.

Item Type: Journal Article
Subjects: Q Science > QC Physics
Journal or Publication Title: PHYSICAL REVIEW B
Publisher: AMERICAN PHYSICAL SOC
ISSN: 0163-1829
Official Date: 1 September 2000
Dates:
DateEvent
1 September 2000UNSPECIFIED
Volume: 62
Number: 10
Number of Pages: 4
Page Range: R6104-R6107
Publication Status: Published

Data sourced from Thomson Reuters' Web of Knowledge

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