Ultrasonic studies on colossal magnetoresistive Nd0.67A0.33MnO3 (A=Ca, Sr)

Elastic Properties of Double-Layered Manganite La1.2Sr1.8-xBaxMn2O7(x=0.0-0.4)

“…In case of oxides having the same mean atomic weight (M/q), the variation in the mean atomic weight corresponds to the variation in the values of v L /ρ x and v S /ρ x , because the product of M/q with v L /ρ x and v S /ρ x should be a constant [9,18,19]. The similar behavior can be seen from Fig.…”

“…The ultrasonic measurements were carried out by the UPT technique at room temperature (300 K) [9]. Longitudinal and shear velocities have been measured using X-and Y -cut quartz transducers, respectively, with a fundamental frequency of 1 MHz.…”

Elastic Properties of Colossal Magnetoresistive Manganites R0.67Sr0.33MnO3(R = Pr, Nd, Gd)

“…According to this model "the elastic constant and acoustic Debye temperature value of polycrystalline oxide material is equal to the average of stoichiometric compositional addition of elastic constant and acoustic Debye temperature values of metallic elements present in the material". Our earlier studies on cubic perovskite and DL manganite samples indicate that MMM rule is a valid model for the estimation of elastic constants of these materials [7,12].…”

“…The ultrasonic measurements were carried out by the UPT technique at room temperature [7]. Longitudinal and shear velocities have been measured using X-cut and Y -cut quartz transducers, respectively, with a fundamental frequency of 1 MHz.…”

“…When a material is subjected to an external magnetic field, stress will develop in the material. Therefore, a CMR material must be evaluated with respect to its elastic behavior before it is put into any application [6,7]. The elastic properties along with electric and magnetic * e-mail: ysreddy.ou@gmail.com properties are important to decide the suitability of a material for a specific application.…”