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Self-doped lanthanum manganites as a phase-separated system: Transformation of magnetic, resonance, and transport properties with doping and hydrostatic compression
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10.1063/1.3007993
/content/aip/journal/jap/104/9/10.1063/1.3007993
http://aip.metastore.ingenta.com/content/aip/journal/jap/104/9/10.1063/1.3007993

Figures

Image of FIG. 1.
FIG. 1.

SEM morphology of the cleaved surface for the samples (a) , (b) , (c) , (d) , and (e) .

Image of FIG. 2.
FIG. 2.

The histograms of the grain size distribution for the and samples.

Image of FIG. 3.
FIG. 3.

Temperature dependences of the change in the oscillator frequency, , at normal pressure for the samples under study. Inset shows evolution of these dependences at high pressures for .

Image of FIG. 4.
FIG. 4.

Plot of Curie temperature against hydrostatic pressure for the samples: open squares represent , open triangles represent , and open circles represent .

Image of FIG. 5.
FIG. 5.

The NMR spectra at 77 K.

Image of FIG. 6.
FIG. 6.

vs curves at different pressures for the sample. Inset shows these dependences in semilogarithmic scale.

Image of FIG. 7.
FIG. 7.

vs curves at different pressures for the sample.

Image of FIG. 8.
FIG. 8.

vs curves at different pressures for the sample.

Image of FIG. 9.
FIG. 9.

vs curves at different pressures for the sample.

Image of FIG. 10.
FIG. 10.

Dependences of (a) NMR signal intensity and (b) resistivity on the La/Mn ratio . Measurements of resistivity were carried out at normal (open circles) and high (crosses) pressures.

Image of FIG. 11.
FIG. 11.

Dependences vs for the samples. Arrows show Curie temperatures determined from magnetic measurements.

Image of FIG. 12.
FIG. 12.

Dependences vs in a low temperature region for the and samples.

Image of FIG. 13.
FIG. 13.

Simulated vs dependences (thin lines) along with the experimental data (thick line) for the sample at normal pressure. Calculations were carried out for different values of the parameter of magnetic transition broadening [see Eqs. (2)–(5)].

Image of FIG. 14.
FIG. 14.

The same as in Fig. 13 for the sample.

Image of FIG. 15.
FIG. 15.

The same as in Fig. 13 for the sample.

Image of FIG. 16.
FIG. 16.

Simulated vs dependences (thin lines) along with the experimental data (thick line) for the sample at a pressure of 11.5 kbar. Calculations were carried out for different values of the parameter of magnetic transition broadening [see Eqs. (2)–(5)].

Image of FIG. 17.
FIG. 17.

The same as in Fig. 16 for the sample.

Tables

Generic image for table
Table I.

Crystallographic data and refined chemical composition for the samples under investigation.

Generic image for table
Table II.

Magnetic and resonance ( NMR) properties of the samples.

Generic image for table
Table III.

Parameters of the PM and FM phase resistivity used for the calculations of vs dependences at normal pressure see [Eqs. (2), (4), and (5)].

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/content/aip/journal/jap/104/9/10.1063/1.3007993
2008-11-06
2014-04-16
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Self-doped lanthanum manganites as a phase-separated system: Transformation of magnetic, resonance, and transport properties with doping and hydrostatic compression
http://aip.metastore.ingenta.com/content/aip/journal/jap/104/9/10.1063/1.3007993
10.1063/1.3007993
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