Details
| Original language | English |
|---|---|
| Article number | 1573 |
| Pages (from-to) | 21 |
| Journal | MATERIALS |
| Volume | 16 |
| Issue number | 4 |
| Early online date | 13 Feb 2023 |
| Publication status | Published - Feb 2023 |
| Externally published | Yes |
Abstract
We have investigated the structural, magnetic, and electrical transport properties of Pr 0.7 Sr 0.3 Mn (1−x)Co x O 3 nanopowders (x = 0, 0.05, 0.10 and 0.15). The Pechini Sol-gel method was used to synthesize these nanopowders. X-ray diffraction at room temperature shows that all the nano powders have an orthorhombic structure of Pnma space group crystallography. The average crystallite size of samples x = 0, 0.05, 0.10, and 0.15 are 33.78 nm, 29 nm, 33.61 nm, and 24.27 nm, respectively. Semi-quantitative chemical analysis by energy dispersive spectroscopy (EDS) confirms the expected stoichiometry of the sample. Magnetic measurements indicate that all samples show a ferromagnetic (FM) to paramagnetic (PM) transition with increasing temperature. The Curie temperature T C gradually decreases (300 K, 270 K, 250 K, and 235 K for x = 0, 0.05, 0.10, and 0.15, respectively) with increasing Co concentrations. The M-H curves for all compounds reveal the PM behavior at 300 K, while the FM behavior characterizes the magnetic hysteresis at low temperature (5 K). The electrical resistivity measurements show that all compounds exhibit metallic behavior at low temperature (T < T (Formula presented.)) well fitted by the relation (Formula presented.) = (Formula presented.) 0 + (Formula presented.) 2T 2 + (Formula presented.) 4.5T 4.5 and semiconductor behavior above Tρ (T > T (Formula presented.)), for which the electronic transport can be explained by the variable range hopping model and the adiabatic small polaron hopping model. All samples have significant magnetoresistance (MR) values, even at room temperature. This presented research provides an innovative and practical approach to develop materials in several technological areas, such as ultra-high density magnetic recording and magneto resistive sensors.
Keywords
- magnetization, magnetoresistance (MR), Mn-perovskite, resistivity and electrical conduction, X-ray diffraction
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Condensed Matter Physics
- Materials Science(all)
- General Materials Science
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In: MATERIALS, Vol. 16, No. 4, 1573, 02.2023, p. 21.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Effects of Partial Manganese Substitution by Cobalt on the Physical Properties of Pr0.7Sr0.3Mn(1−x)CoxO3 (0 ≤ x ≤ 0.15) Manganites
AU - Zdiri, Feriel
AU - Alonso, José María
AU - Mnasri, Taoufik
AU - Presa, Patricia de la
AU - Morales, Irene
AU - Martínez, José Luis
AU - Younes, Rached Ben
AU - Marin, Pilar
N1 - Publisher Copyright: © 2023 by the authors.
PY - 2023/2
Y1 - 2023/2
N2 - We have investigated the structural, magnetic, and electrical transport properties of Pr 0.7 Sr 0.3 Mn (1−x)Co x O 3 nanopowders (x = 0, 0.05, 0.10 and 0.15). The Pechini Sol-gel method was used to synthesize these nanopowders. X-ray diffraction at room temperature shows that all the nano powders have an orthorhombic structure of Pnma space group crystallography. The average crystallite size of samples x = 0, 0.05, 0.10, and 0.15 are 33.78 nm, 29 nm, 33.61 nm, and 24.27 nm, respectively. Semi-quantitative chemical analysis by energy dispersive spectroscopy (EDS) confirms the expected stoichiometry of the sample. Magnetic measurements indicate that all samples show a ferromagnetic (FM) to paramagnetic (PM) transition with increasing temperature. The Curie temperature T C gradually decreases (300 K, 270 K, 250 K, and 235 K for x = 0, 0.05, 0.10, and 0.15, respectively) with increasing Co concentrations. The M-H curves for all compounds reveal the PM behavior at 300 K, while the FM behavior characterizes the magnetic hysteresis at low temperature (5 K). The electrical resistivity measurements show that all compounds exhibit metallic behavior at low temperature (T < T (Formula presented.)) well fitted by the relation (Formula presented.) = (Formula presented.) 0 + (Formula presented.) 2T 2 + (Formula presented.) 4.5T 4.5 and semiconductor behavior above Tρ (T > T (Formula presented.)), for which the electronic transport can be explained by the variable range hopping model and the adiabatic small polaron hopping model. All samples have significant magnetoresistance (MR) values, even at room temperature. This presented research provides an innovative and practical approach to develop materials in several technological areas, such as ultra-high density magnetic recording and magneto resistive sensors.
AB - We have investigated the structural, magnetic, and electrical transport properties of Pr 0.7 Sr 0.3 Mn (1−x)Co x O 3 nanopowders (x = 0, 0.05, 0.10 and 0.15). The Pechini Sol-gel method was used to synthesize these nanopowders. X-ray diffraction at room temperature shows that all the nano powders have an orthorhombic structure of Pnma space group crystallography. The average crystallite size of samples x = 0, 0.05, 0.10, and 0.15 are 33.78 nm, 29 nm, 33.61 nm, and 24.27 nm, respectively. Semi-quantitative chemical analysis by energy dispersive spectroscopy (EDS) confirms the expected stoichiometry of the sample. Magnetic measurements indicate that all samples show a ferromagnetic (FM) to paramagnetic (PM) transition with increasing temperature. The Curie temperature T C gradually decreases (300 K, 270 K, 250 K, and 235 K for x = 0, 0.05, 0.10, and 0.15, respectively) with increasing Co concentrations. The M-H curves for all compounds reveal the PM behavior at 300 K, while the FM behavior characterizes the magnetic hysteresis at low temperature (5 K). The electrical resistivity measurements show that all compounds exhibit metallic behavior at low temperature (T < T (Formula presented.)) well fitted by the relation (Formula presented.) = (Formula presented.) 0 + (Formula presented.) 2T 2 + (Formula presented.) 4.5T 4.5 and semiconductor behavior above Tρ (T > T (Formula presented.)), for which the electronic transport can be explained by the variable range hopping model and the adiabatic small polaron hopping model. All samples have significant magnetoresistance (MR) values, even at room temperature. This presented research provides an innovative and practical approach to develop materials in several technological areas, such as ultra-high density magnetic recording and magneto resistive sensors.
KW - magnetization
KW - magnetoresistance (MR)
KW - Mn-perovskite
KW - resistivity and electrical conduction
KW - X-ray diffraction
UR - http://www.scopus.com/inward/record.url?scp=85149238772&partnerID=8YFLogxK
U2 - 10.3390/ma16041573
DO - 10.3390/ma16041573
M3 - Article
VL - 16
SP - 21
JO - MATERIALS
JF - MATERIALS
SN - 1996-1944
IS - 4
M1 - 1573
ER -