Exchange interaction between ferromagnetic and antiferromagnetic phases in La1/3Nd1/3Ca1/3MnO3

Baszyński, J.; Kováč, J.; Kowałczyk, A.

doi:10.1016/s0304-8853(98)00603-9

Cited by 9 publications

(4 citation statements)

References 9 publications

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“…Nikolaev et al (2000) fabricated La 1/3 Ca 2/3 MnO 3 /La 2/3 Ca 1/3 MnO 3 /La 1/3 Ca 2/3 MnO 3 trilayers using ozone-assisted molecular beam epitaxy. Even very thin (2.3 nm -4.6 nm) manganite films showed metallic conductivity and ferromagnetism below comparatively high Curie temperatures of 200 K. The exchange field was found to be about 800 G at 5 K. Shifted hysteresis loops were also observed in NSMO ceramics (Baszyński et al 1999) and La 0.5 Ca 0.5 MnO 3 films (Roy et al 1999).…”

Section: Exchange Biasing Multilayers and Gmrmentioning

confidence: 89%

Extrinsic magnetotransport phenomena in ferromagnetic oxides

Ziese¹

2002

Rep. Prog. Phys.

475

362

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Magnetic oxides show a variety of extrinsic magnetotransport phenomena: grain-boundary-, tunnelling-and domain-wall magnetoresistance. In view of these phenomena the role of some magnetic oxides is outstanding: these are believed to be half-metallic having only one spin-subband at the Fermi level. These fully spinpolarized oxides have great potential for applications in spin-electronic devices and have, accordingly, attracted an intense research activity in recent years.This review is focused on extrinsic magnetotransport effects in ferromagnetic oxides. It consists of two parts; the second part is devoted to an overview of experimental data and theoretical models for extrinsic magnetotransport phenomena. Here a critical discussion of domain-wall scattering is given. Results on surfacial and interfacial magnetism in oxides are presented. Spin-polarized tunnelling in ferromagnetic junctions is reviewed and grain-boundary magnetoresistance is interpreted within a model of spin-polarized tunnelling through natural oxide barriers. The situation in ferromagnetic oxides is compared with data and models for conventional ferromagnets. The first part of the review summarizes basic material properties, especially data on the spin-polarization and evidence for half-metallicity. Furthermore, intrinsic conduction mechanisms are discussed. An outlook on the further development of oxide spinelectronics concludes this review.

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Section: Exchange Biasing Multilayers and Gmrmentioning

confidence: 89%

Extrinsic magnetotransport phenomena in ferromagnetic oxides

Ziese¹

2002

Rep. Prog. Phys.

475

362

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“…The giant and the colossal magnetoresistance (GMR and CMR, respectively) effects observed in bulk La 0.33 Nd 0.33 Ca 0.33 MnO 3 by a number of investigators [1][2][3] have attracted considerable attention because of the fundamental physics involved and the potential technological applications [4]. A bulk sample of La 0.33 Nd 0.33 Ca 0.33 MnO 3 (LNCMO) gives a very prominent negative CMR, larger than ∼ 90% at a particular temperature T =90 K [3].…”

Section: Introductionmentioning

confidence: 99%

“…A bulk sample of La 0.33 Nd 0.33 Ca 0.33 MnO 3 (LNCMO) gives a very prominent negative CMR, larger than ∼ 90% at a particular temperature T =90 K [3]. This bulk sample also shows temperature hysteretic effects in resistivity [2,3]. No attempts has been made to study the effects of higher magnetic fields on the CMR and temperature hysteretic effects in bulk LNCMO.…”

Section: Introductionmentioning

confidence: 99%

Temperature hysteretic effect and its influence on colossal magnetoresistance of La0.33Nd0.33Ca0.33MnO3

et al. 2002

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Electrical resistance (R) measurements of a bulk La 0.33 Nd 0.33 Ca 0.33 MnO 3 perovskite in magnetic fields up to 40 kOe have revealed anomalous temperature hysteretic effects both in 0 Oe and 20 kOe magnetic fields. The sharp peak observed in the R vs. T plot indicates the occurrence of metal-to-insulator (M-I) transition at a temperature of T MI = 110 K and 140 K, for cooling and warming paths, respectively. An applied magnetic field of 20 kOe reduces the resistance and shifts T MI to 160 K and 185 K for cooling and warming, respectively. We have observed a much higher resistance in the cooling path than in the warming path leading to the hysteretic resistance ratio (R cool /R warm ) of 200 at 110 K and 1.8 at 160 K for 0 Oe and 20 kOe, respectively. Record values of colossal magnetoresistance (CMR) have been achieved. The CMR value reaches nearly 99% in the temperature ranges of 90 K to 140 K and 90 K to 170 K for 20 kOe and 40 kOe magnetic fields in the cooling mode, respectively. The observed unusual behavior is attributed to the co-existence of La-rich and Nd-rich domains assumed to be distributed randomly in the compound.

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“…The (La 1Ϫy Nd y ) 1Ϫx Ca x MnO 3 series for xϳ1/3 has been thoroughly studied, [9][10][11][12][13][14][15][16] and may be classified as a typical FM-coupling-controlled system of manganese perovskites. Systematic studies indicate that this system shows clear manifestation of PS in magnetization measurements for y Ͼ0.4.…”

Section: Introductionmentioning

confidence: 99%

Effects of phase separation on the magnetization, x-ray diffraction, and Raman scattering of(La1−yNdy
Granado
¹
,
Garcia
²
,
Ja
³

et al. 2001
Phys. Rev. B
15
0
6
0
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Dc-magnetization, x-ray diffraction, and Raman-scattering studies in polycrystalline (La 1Ϫy Nd y) 1Ϫx Ca x MnO 3 (yϭ0.0,0.5,1.0, and xϭ1/3) samples are presented. The samples with yϭ0.5 and 1.0 show complex magnetic states at low temperatures, with a ferromagnetic coupling strength that weakens with increasing y. X-ray measurements show a single crystallographic phase at all temperatures for yϭ0.5, with lattice parameter anomalies at temperatures related to electronic and magnetic transitions. The presence of high-frequency vibrational modes in Raman-scattering measurements indicates the existence of charge-and orbital-ordered domains for yϭ0.5 and 1.0, which are closely related to the antiferromagnetic component identified by the magnetization experiments. The close relationship between results obtained by magnetic, structural, and optical probes is discussed.

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Exchange interaction between ferromagnetic and antiferromagnetic phases in La1/3Nd1/3Ca1/3MnO3

Cited by 9 publications

References 9 publications

Extrinsic magnetotransport phenomena in ferromagnetic oxides

Extrinsic magnetotransport phenomena in ferromagnetic oxides

Temperature hysteretic effect and its influence on colossal magnetoresistance of La0.33Nd0.33Ca0.33MnO3

Effects of phase separation on the magnetization, x-ray diffraction, and Raman scattering of(La1−yNdy
Granado
¹
,
Garcia
²
,
Ja
³

et al. 2001
Phys. Rev. B
15
0
6
0
View full text Add to dashboard Cite

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Exchange interaction between ferromagnetic and antiferromagnetic phases in La1/3Nd1/3Ca1/3MnO3

Cited by 9 publications

References 9 publications

Extrinsic magnetotransport phenomena in ferromagnetic oxides

Extrinsic magnetotransport phenomena in ferromagnetic oxides

Temperature hysteretic effect and its influence on colossal magnetoresistance of La0.33Nd0.33Ca0.33MnO3

Effects of phase separation on the magnetization, x-ray diffraction, and Raman scattering of(La1−yNdyGranado1, Garcia2, Ja3 et al. 2001Phys. Rev. B15060View full textAdd to dashboardCite

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Effects of phase separation on the magnetization, x-ray diffraction, and Raman scattering of(La1−yNdy
Granado
¹
,
Garcia
²
,
Ja
³

et al. 2001
Phys. Rev. B
15
0
6
0
View full text Add to dashboard Cite