Electrical and Magnetic Properties of Strontium Substituted Lanthanum Manganate Perovskite Crystals Prepared Using Fused Salt Electrolysis

McCarroll, W. H.; Ramanujachary, Kandalam V.; Fawcett, Ian D.; Greenblatt, Martha

doi:10.1006/jssc.1999.8224

“…McCarroll and co-authors reported the electrochemical growth of good quality single crystals and a GMR study of pure and doped lanthanum manganates [20,21]. Crystals suitable for GMR and susceptibility studies as well as Hall effect and spectroscopy measurements were successfully grown.…”

Section: Introductionmentioning

confidence: 95%

Electrochemical growth and properties of LaMn_1−xCo_xO₃ (0 < x ≤ 1) single crystals

Khalyavin¹,

Shiryaev

²

,

Бычков

³

et al. 2003

Cryst. Res. Technol.

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“…The synthesis conditions were similar to those described in [2]. The crystals of La 0.83 Sr 0.13 MnO 2.98 were grown by electrolysis in a melt obtained from a mixture of Cs 2 MoO 4 and MoO 3 to which SrMoO 4 , MnCO 3 and La 2 O 3 were added.…”

Section: Methodsmentioning

confidence: 99%

“…La 1-x Sr x MnO 3 is a typical perovskite CMR system [2][3][4][5][6][7]. Its structural symmetry changes from orthorhombic to rhombohedral with increasing x up to 0.8.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Micromagnetic and magnetoresistance studies of ferromagneticLa0.83Sr0.13MnO
Popov
¹
,
Kalinin
²
,
Emge
³

et al. 2002
Phys. Rev. B
Self Cite
11
0
5
0
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Magnetic force microscopy (MFM) and atomic force microscopy (AFM) were used to investigate the surface topography and micromagnetic structure of La 0.83 Sr 0.13 MnO 2.98 single crystals with colossal magnetoresistance (CMR). The crystals were grown by fused salt electrolysis and characterized by chemical analysis, X-ray diffraction, magnetic and transport measurements. The crystals are rhombohedral (R 3 c). Magnetic and transport measurements indicate that the ferromagnetic ordering at 310 K is associated with an insulator-metal transition at the same temperature. A maximum negative magnetoresistance (-62 %) is observed at 290 K in an applied magnetic field of 5 T. The magnetoresistance increases in magnitude sharply (1.8 %), comparing to the rest of the change, with increasing magnetic field up to 20 G, and then it increases slowly with increasing field.MFM and AFM were used to study the (110) surface as well as a number of unspecified surfaces. Surface topography of an as-grown crystal exhibits well-developed surface corrugations due to extensive twinning. The corrugation angle at twin boundaries can be related to the unit cell parameters, surface and twinning planes. Magnetic force microscopy images show that magnetic domain boundaries are pinned to the crystallographic twins; a small number of unpinned boundaries are observed. The statistical analysis of domain boundary angle distribution is consistent with cubic magnetocrystalline anisotropy with easy axis along [100] directions for this material. Unusual magnetization behavior in the vicinity of topological defects on the surface is also reported. MFM contrast was found to disappear above the ferromagnetic Curie temperature; after cooling a new magnetic structure comprised of Bloch walls of opposite chiralities developed. Comments ABSTRACTMagnetic force microscopy (MFM) and atomic force microscopy (AFM) were used to investigate the surface topography and micromagnetic structure of La 0.83 Sr 0.13 MnO 2.98 single crystals with colossal magnetoresistance (CMR). The crystals were grown by fused salt electrolysis and characterized by chemical analysis, X-ray diffraction, magnetic and transport measurements. The crystals are rhombohedral (R 3 c). Magnetic and transport measurements indicate that the ferromagnetic ordering at 310 K is associated with an insulator-metal transition at the same temperature. A maximum negative magnetoresistance (-62 %) is observed at 290 K in an applied magnetic field of 5 T. The magnetoresistance increases in magnitude sharply (1.8 %), comparing to the rest of the change, with increasing magnetic field up to 20 G, and then it increases slowly with increasing field.MFM and AFM were used to study the (110) surface as well as a number of unspecified surfaces. Surface topography of an as-grown crystal exhibits well-developed surface corrugations due to extensive twinning. The corrugation angle at twin boundaries can be related to the unit cell parameters, surface and twinning planes. Magnetic force microscopy images show that ...

show abstract

“…While many single crystal growth techniques require special equipment and are in general difficult to utilize, recently the fused salt electrolysis technique was proven to be an easy method of growing single crystals of doped rare earth manganates [2].…”

Section: Introductionmentioning

confidence: 99%

Micromagnetic and Magnetoresistance Studies of Ferromagnetic La_0.83Sr_0.13MnO_2.98 Crystals

Popov

¹

,

Kalinin

²

,

Alvarez

³

et al. 2000

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Magnetic force microscopy (MFM) and atomic force microscopy (AFM) were used to investigate the surface topography and micromagnetic structure of La 0.83 Sr 0.13 MnO 2.98 single crystals with colossal magnetoresistance (CMR). The crystals were grown by fused salt electrolysis and characterized by chemical analysis, X-ray diffraction, magnetic and transport measurements. The crystals are rhombohedral (R 3 c). Magnetic and transport measurements indicate that the ferromagnetic ordering at 310 K is associated with an insulator-metal transition at the same temperature. A maximum negative magnetoresistance (-62 %) is observed at 290 K in an applied magnetic field of 5 T. The magnetoresistance increases in magnitude sharply (1.8 %), comparing to the rest of the change, with increasing magnetic field up to 20 G, and then it increases slowly with increasing field.MFM and AFM were used to study the (110) surface as well as a number of unspecified surfaces. Surface topography of an as-grown crystal exhibits well-developed surface corrugations due to extensive twinning. The corrugation angle at twin boundaries can be related to the unit cell parameters, surface and twinning planes. Magnetic force microscopy images show that magnetic domain boundaries are pinned to the crystallographic twins; a small number of unpinned boundaries are observed. The statistical analysis of domain boundary angle distribution is consistent with cubic magnetocrystalline anisotropy with easy axis along [100] directions for this material. Unusual magnetization behavior in the vicinity of topological defects on the surface is also reported. MFM contrast was found to disappear above the ferromagnetic Curie temperature; after cooling a new magnetic structure comprised of Bloch walls of opposite chiralities developed. Comments ABSTRACTMagnetic force microscopy (MFM) and atomic force microscopy (AFM) were used to investigate the surface topography and micromagnetic structure of La 0.83 Sr 0.13 MnO 2.98 single crystals with colossal magnetoresistance (CMR). The crystals were grown by fused salt electrolysis and characterized by chemical analysis, X-ray diffraction, magnetic and transport measurements. The crystals are rhombohedral (R 3 c). Magnetic and transport measurements indicate that the ferromagnetic ordering at 310 K is associated with an insulator-metal transition at the same temperature. A maximum negative magnetoresistance (-62 %) is observed at 290 K in an applied magnetic field of 5 T. The magnetoresistance increases in magnitude sharply (1.8 %), comparing to the rest of the change, with increasing magnetic field up to 20 G, and then it increases slowly with increasing field.MFM and AFM were used to study the (110) surface as well as a number of unspecified surfaces. Surface topography of an as-grown crystal exhibits well-developed surface corrugations due to extensive twinning. The corrugation angle at twin boundaries can be related to the unit cell parameters, surface and twinning planes. Magnetic force microscopy images show that ...

show abstract

Electrical and Magnetic Properties of Strontium Substituted Lanthanum Manganate Perovskite Crystals Prepared Using Fused Salt Electrolysis

Cited by 19 publications

References 40 publications

Electrochemical growth and properties of LaMn_1−xCo_xO₃ (0 < x ≤ 1) single crystals

Electrochemical growth and properties of LaMn_1−xCo_xO₃ (0 < x ≤ 1) single crystals

Micromagnetic and magnetoresistance studies of ferromagneticLa0.83Sr0.13MnO
Popov
¹
,
Kalinin
²
,
Emge
³

et al. 2002
Phys. Rev. B
Self Cite
11
0
5
0
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Micromagnetic and Magnetoresistance Studies of Ferromagnetic La_0.83Sr_0.13MnO_2.98 Crystals

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Electrical and Magnetic Properties of Strontium Substituted Lanthanum Manganate Perovskite Crystals Prepared Using Fused Salt Electrolysis

Cited by 19 publications

References 40 publications

Electrochemical growth and properties of LaMn1−xCoxO3 (0 < x ≤ 1) single crystals

Electrochemical growth and properties of LaMn1−xCoxO3 (0 < x ≤ 1) single crystals

Micromagnetic and magnetoresistance studies of ferromagneticLa0.83Sr0.13MnOPopov1, Kalinin2, Emge3 et al. 2002Phys. Rev. BSelf Cite11050View full textAdd to dashboardCite

Micromagnetic and Magnetoresistance Studies of Ferromagnetic La0.83Sr0.13MnO2.98 Crystals

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Electrochemical growth and properties of LaMn_1−xCo_xO₃ (0 < x ≤ 1) single crystals

Electrochemical growth and properties of LaMn_1−xCo_xO₃ (0 < x ≤ 1) single crystals

Micromagnetic and magnetoresistance studies of ferromagneticLa0.83Sr0.13MnO
Popov
¹
,
Kalinin
²
,
Emge
³

et al. 2002
Phys. Rev. B
Self Cite
11
0
5
0
View full text Add to dashboard Cite

Micromagnetic and Magnetoresistance Studies of Ferromagnetic La_0.83Sr_0.13MnO_2.98 Crystals