Abstract
The search for a new superconductor in an early transition metal oxide prompted the investigation of the La1-xSrxTiO3 series of compounds. The solid solution La1-xSrxTiO3 (0 ≤ x ≤ 1) has been prepared by arc melting stoichiometric amounts of SrTiO3 and LaTiO3. Single-phase samples can be made for the entire stoichiometry range. The polycrystalline samples have been characterized using microprobe, thermogravimetric analysis, powder X-ray and neutron diffraction, temperature-dependent magnetization, and dc resistivity. The compounds crystallize in the orthorhombic space groups Pbnm (x ≤ 0.30) and Ibmm (0.30 < x < 0.80), and the cubic space group Pm3m (x ≥ 0.80). The Pbnm structure exists in two forms, O′-orthorhombic (x < 0.10) and O-orthorhombic (0.10 ≤ x ≤ 0.30), which are a result of Jahn-Teller distortion. The samples x = 0.00, 0.05 are canted antiferromagnets which exhibit a net ferromagnetic moment below 150 K and temperature-independent magnetism from 150 to 300 K. All other compositions show temperature-independent magnetism from 160 to 300 K with some samples (x ≥ 0.50) displaying paramagnetism in the low-temperature range. The temperature dependent resistivity measurements show that the samples are metallic (x ≤ 0.70) and semiconducting (x = 0.90). The x = 0.80 sample undergoes a semiconductor-metal transition. The properties of these materials are discussed in reference to the phenomenological phase diagram for perovskites proposed by Goodenough and high-Tc superconductivity.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 346-353 |
| Number of pages | 8 |
| Journal | Chemistry of Materials |
| Volume | 4 |
| Issue number | 2 |
| State | Published - 1992 |
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ASJC Scopus subject areas
- Materials Chemistry
- Materials Science(all)
Cite this
Synthesis, structure, and properties of La1-xSrxTiO3 (0 < x < 1). / Sunstrom IV, Joseph E.; Kauzlarich, Susan M.; Klavins, Peter.
In: Chemistry of Materials, Vol. 4, No. 2, 1992, p. 346-353.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Synthesis, structure, and properties of La1-xSrxTiO3 (0 < x < 1)
AU - Sunstrom IV, Joseph E.
AU - Kauzlarich, Susan M.
AU - Klavins, Peter
PY - 1992
Y1 - 1992
N2 - The search for a new superconductor in an early transition metal oxide prompted the investigation of the La1-xSrxTiO3 series of compounds. The solid solution La1-xSrxTiO3 (0 ≤ x ≤ 1) has been prepared by arc melting stoichiometric amounts of SrTiO3 and LaTiO3. Single-phase samples can be made for the entire stoichiometry range. The polycrystalline samples have been characterized using microprobe, thermogravimetric analysis, powder X-ray and neutron diffraction, temperature-dependent magnetization, and dc resistivity. The compounds crystallize in the orthorhombic space groups Pbnm (x ≤ 0.30) and Ibmm (0.30 < x < 0.80), and the cubic space group Pm3m (x ≥ 0.80). The Pbnm structure exists in two forms, O′-orthorhombic (x < 0.10) and O-orthorhombic (0.10 ≤ x ≤ 0.30), which are a result of Jahn-Teller distortion. The samples x = 0.00, 0.05 are canted antiferromagnets which exhibit a net ferromagnetic moment below 150 K and temperature-independent magnetism from 150 to 300 K. All other compositions show temperature-independent magnetism from 160 to 300 K with some samples (x ≥ 0.50) displaying paramagnetism in the low-temperature range. The temperature dependent resistivity measurements show that the samples are metallic (x ≤ 0.70) and semiconducting (x = 0.90). The x = 0.80 sample undergoes a semiconductor-metal transition. The properties of these materials are discussed in reference to the phenomenological phase diagram for perovskites proposed by Goodenough and high-Tc superconductivity.
AB - The search for a new superconductor in an early transition metal oxide prompted the investigation of the La1-xSrxTiO3 series of compounds. The solid solution La1-xSrxTiO3 (0 ≤ x ≤ 1) has been prepared by arc melting stoichiometric amounts of SrTiO3 and LaTiO3. Single-phase samples can be made for the entire stoichiometry range. The polycrystalline samples have been characterized using microprobe, thermogravimetric analysis, powder X-ray and neutron diffraction, temperature-dependent magnetization, and dc resistivity. The compounds crystallize in the orthorhombic space groups Pbnm (x ≤ 0.30) and Ibmm (0.30 < x < 0.80), and the cubic space group Pm3m (x ≥ 0.80). The Pbnm structure exists in two forms, O′-orthorhombic (x < 0.10) and O-orthorhombic (0.10 ≤ x ≤ 0.30), which are a result of Jahn-Teller distortion. The samples x = 0.00, 0.05 are canted antiferromagnets which exhibit a net ferromagnetic moment below 150 K and temperature-independent magnetism from 150 to 300 K. All other compositions show temperature-independent magnetism from 160 to 300 K with some samples (x ≥ 0.50) displaying paramagnetism in the low-temperature range. The temperature dependent resistivity measurements show that the samples are metallic (x ≤ 0.70) and semiconducting (x = 0.90). The x = 0.80 sample undergoes a semiconductor-metal transition. The properties of these materials are discussed in reference to the phenomenological phase diagram for perovskites proposed by Goodenough and high-Tc superconductivity.
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UR - http://www.scopus.com/inward/citedby.url?scp=0001348575&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:0001348575
VL - 4
SP - 346
EP - 353
JO - Chemistry of Materials
JF - Chemistry of Materials
SN - 0897-4756
IS - 2
ER -