1887
banner image
No data available.
Please log in to see this content.
You have no subscription access to this content.
No metrics data to plot.
The attempt to load metrics for this article has failed.
The attempt to plot a graph for these metrics has failed.
Ferromagnetic clusters in the Brownmillerite bilayered compounds : An approach to achieve layered spintronics materials
Rent:
Rent this article for
USD
10.1063/1.3277055
/content/aip/journal/jap/107/1/10.1063/1.3277055
http://aip.metastore.ingenta.com/content/aip/journal/jap/107/1/10.1063/1.3277055

Figures

Image of FIG. 1.
FIG. 1.

Observed (open circles) and calculated (solid lines) XRD patterns of (, 0.05, 0.075, and 0.10) at room temperature. Solid line at the bottom of each panel shows the difference between observed and calculated patterns. Vertical lines show the position of Bragg peaks. The values corresponding to intense Bragg peaks are also listed.

Image of FIG. 2.
FIG. 2.

The crystal structure of the compounds .

Image of FIG. 3.
FIG. 3.

The La concentration dependence of lattice constants and unit cell volume.

Image of FIG. 4.
FIG. 4.

The temperature dependent and curves for (, 0.05, 0.075, and 0.10) compounds under 100 Oe applied magnetic field.

Image of FIG. 5.
FIG. 5.

(a) The virgin magnetization curves for all four samples at 5 K. The solid curves are the fit to the observed data with Eq. (1). (b) The vs curves over all four quadrants for (, 0.05, 0.075, and 0.10) at 5 K. Inset (i) shows an enlarge view of the vs curves for , 0.075, and 0.1 samples at lower fields, where a clear hysteresis is seen for the and 0.1 samples. Inset (ii) shows the dependency of the coercive field and remanent magnetization on the La concentration at 5 K.

Image of FIG. 6.
FIG. 6.

The hysteresis loop for the sample with and 0.075 at 5 K [after subtraction of the linear AFM contribution as per Eq. (1)]. The numbers and the arrows indicate the sequence and the direction of the field sweep.

Image of FIG. 7.
FIG. 7.

The temperature dependent electrical resistivity curves for (, 0.05, 0.075, and 0.10). Solid lines are the fitting of the observed data with Eq. (2).

Image of FIG. 8.
FIG. 8.

(a) The MR vs applied magnetic field at 150 K for (, 0.05, 0.075, and 0.10). The inset shows the field dependent MR at 300 K for all samples. [(b) and (c)] The dependency of the MR on magnetic field at 300, 200, and 150 K for the samples and 0.1, respectively. The solid lines are fit to the data according to Eq. (8). Insets show the temperature dependence of the exponent for respective samples.

Tables

Generic image for table
Table I.

The Rietveld refined unit cell parameters, atomic positions, isotropic thermal parameters, and for the samples with , 0.05, 0.075, and 0.1.

Generic image for table
Table II.

The fitted parameters , , , and derived from the magnetization data.

Generic image for table
Table III.

The parameters as deduced from the electrical transport data.

Generic image for table
Table IV.

The fitted and parameters derived from the MR data.

Loading

Article metrics loading...

/content/aip/journal/jap/107/1/10.1063/1.3277055
2010-01-07
2014-04-23
Loading

Full text loading...

This is a required field
Please enter a valid email address
752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Ferromagnetic clusters in the Brownmillerite bilayered compounds Ca2.5−xLaxSr0.5GaMn2O8: An approach to achieve layered spintronics materials
http://aip.metastore.ingenta.com/content/aip/journal/jap/107/1/10.1063/1.3277055
10.1063/1.3277055
SEARCH_EXPAND_ITEM