Ultrasonic studies on colossal magnetoresistive La1-xCaxMnO3 (x = 0.25, 0.33 and 0.45)

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Abstract

The colossal magnetoresistive material La1-xCaxMnO3 with x=0.25, 0.33, and 0.45, was investigated through sound velocity and ultrasonic attenuation measurements. Lattice hardening was observed below Tc (paramagnetic-ferromagnetic transition) in x=0.25 and 0.33 samples, indicating the prominent role of lattice vibrations in the physical properties of this material. The x=0.45 sample also showed lattice hardening together with velocity hysteresis which is suggested to be caused by simultaneous occurrence of conducting ferromagnetic state and charge-ordered region.

Original languageEnglish
Pages (from-to)425-431
Number of pages7
JournalPhysica B: Condensed Matter
Volume334
Issue number3-4
DOIs
Publication statusPublished - Jul 2003

Fingerprint

hardening
Hardening
ultrasonics
Ultrasonics
Lattice vibrations
Acoustic wave velocity
lattice vibrations
acoustic velocity
Hysteresis
Physical properties
physical properties
attenuation
hysteresis
occurrences
conduction

Keywords

  • Colossal magnetoresistance
  • Sound velocity
  • Ultrasonic attenuation

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

Cite this

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title = "Ultrasonic studies on colossal magnetoresistive La1-xCaxMnO3 (x = 0.25, 0.33 and 0.45)",
abstract = "The colossal magnetoresistive material La1-xCaxMnO3 with x=0.25, 0.33, and 0.45, was investigated through sound velocity and ultrasonic attenuation measurements. Lattice hardening was observed below Tc (paramagnetic-ferromagnetic transition) in x=0.25 and 0.33 samples, indicating the prominent role of lattice vibrations in the physical properties of this material. The x=0.45 sample also showed lattice hardening together with velocity hysteresis which is suggested to be caused by simultaneous occurrence of conducting ferromagnetic state and charge-ordered region.",
keywords = "Colossal magnetoresistance, Sound velocity, Ultrasonic attenuation",
author = "{Nor Azah}, {Nik Jaafar} and {Abd. Shukor}, Roslan",
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T1 - Ultrasonic studies on colossal magnetoresistive La1-xCaxMnO3 (x = 0.25, 0.33 and 0.45)

AU - Nor Azah, Nik Jaafar

AU - Abd. Shukor, Roslan

PY - 2003/7

Y1 - 2003/7

N2 - The colossal magnetoresistive material La1-xCaxMnO3 with x=0.25, 0.33, and 0.45, was investigated through sound velocity and ultrasonic attenuation measurements. Lattice hardening was observed below Tc (paramagnetic-ferromagnetic transition) in x=0.25 and 0.33 samples, indicating the prominent role of lattice vibrations in the physical properties of this material. The x=0.45 sample also showed lattice hardening together with velocity hysteresis which is suggested to be caused by simultaneous occurrence of conducting ferromagnetic state and charge-ordered region.

AB - The colossal magnetoresistive material La1-xCaxMnO3 with x=0.25, 0.33, and 0.45, was investigated through sound velocity and ultrasonic attenuation measurements. Lattice hardening was observed below Tc (paramagnetic-ferromagnetic transition) in x=0.25 and 0.33 samples, indicating the prominent role of lattice vibrations in the physical properties of this material. The x=0.45 sample also showed lattice hardening together with velocity hysteresis which is suggested to be caused by simultaneous occurrence of conducting ferromagnetic state and charge-ordered region.

KW - Colossal magnetoresistance

KW - Sound velocity

KW - Ultrasonic attenuation

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JO - Physica B: Condensed Matter

JF - Physica B: Condensed Matter

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