Investigation of structural, magnetic and electric transport properties of half-doped chromium manganites La0.3R0.2Sr0.5Mn0.5Cr0.5O3 (R=La, Nd, Sm, and Gd)

Singh, Devinder; Mahajan, Arun

doi:10.1016/j.ceramint.2015.05.142

Cited by 14 publications

(6 citation statements)

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“…4 shows a sharp increase in magnetic susceptibility at low temperature below 100 K indicating the ferromagnetic behavior of the material. The value of H is found to be smaller than La 0.3 R 0.2 Sr 0.5 Mn 0.5 Cr 0.5 O 3 (R = La, Nd, Sm, and Gd) [15]. The reason could be due to the fact that smaller Dy 3?…”

Section: Resultsmentioning

confidence: 61%

“…valence state, while the ionic ordering takes place as a rule by a significantly different charge state of ions. The lattice parameters and unit cell volume (Table 1) of La 0.3 Dy 0.2 Sr 0.5 Mn 0.5 Cr 0.5 O 3 were found to be smaller than those of the reported phases La 0.3 R 0.2 Sr 0.5 Mn 0.5 Cr 0.5 O 3 (R = La, Nd, Sm, and Gd) [15]. This is consistent with the smaller size of Dy 3?…”

Section: Resultsmentioning

confidence: 77%

“…From the fits, we obtained the polaron activation energy E a = 0.195 eV. This value is found to be higher than La 0.3 R 0.2 Sr 0.5 Mn 0.5 Cr 0.5 O 3 phases [15]. This could be due to the reason that smaller Dy ion causes greater lattice distortion, which in turn suppresses the hopping probability of e g electrons/polarons from Mn 3?…”

Section: Resultsmentioning

confidence: 86%

“…The sample shows semiconducting behavior in the whole temperature range studied. The resistivity is found to be higher than La 0.3 R 0.2 Sr 0.5 Mn 0.5 Cr 0.5 O 3 phases [15]. The higher resistivity of the phase can be interpreted as a gradual bending of the Mn/Cr-O-Mn/Cr bond angle due to decrease of hr A i, which weakens the exchange interaction and causes the narrowing of the bandwidth hence results in a reduced mobility of the e g electrons.…”

Section: Resultsmentioning

confidence: 93%

“…We have already reported the effect of smaller rare earth ions Nd, Sm, and Gd on the structural, magnetic, and electric transport properties of La 0.5 Sr 0.5 Mn 0.5 Cr 0.5 O 3 [15]. It was observed that decreasing A-site ionic size decreases both Curie temperature (T C ) and Weiss constant (H) and increases of polaron activation energy.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis and characterization of half-doped chromium manganite La0.3Dy0.2Sr0.5Mn0.5Cr0.5O3

2015

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The half-doped chromium manganite La 0.3 Dy 0.2 Sr 0.5 Mn 0.5 Cr 0.5 O 3 has been studied by X-ray diffraction and magnetic and transport measurements. The sample was found to be single phase and crystallized with orthorhombic structure in the space group Pnma. Magnetic measurements showed that the ferromagnetic interactions are dominant and the phase follows Curie-Weiss law only in the high-temperature region. The sample is semiconducting and the transport properties are dominated by the adiabatic small polaron hopping mechanism. Graphical abstract 50 100 150 200 250 300 0 10 20 30 40 50 60 χ m -1 / mol emu -1 50 100 150 200 250 300 0.00 0.04 0.08 0.12 0.16 χ m / emu mol -1 T / K T / K

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Section: Resultsmentioning

confidence: 61%

Section: Resultsmentioning

confidence: 77%

Section: Resultsmentioning

confidence: 86%

Section: Resultsmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations