Influence of oxygen content on the structural, magnetotransport, and magnetic properties of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">LaMnO</mml:mi></mml:mrow><mml:mrow><mml:mn>3</mml:mn><mml:mo>+</mml:mo><mml:mi mathvariant="normal">δ</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:math>

Ritter, C.; Ibarra, M. R.; Teresa, J. M. De; Algarabel, P. A.; Marquina, C.; Blasco, J.; García, J.; Oseroff, S. B.; Cheong, Sang‐Wook

doi:10.1103/physrevb.56.8902

Cited by 338 publications

(274 citation statements)

References 17 publications

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“…Owing to the biaxial strain from substrates, these layers actually assume distorted rhombohedral (DR) structures with a À a À c À rotations 5,6 . For the N ¼ 16 superlattice and the LaMnO 3 þ d film, the Mn valence is close to þ 3, and correspondingly, a distorted orthorhombic (DO) phase emerges with in-phase rotation around one of the in-plane axis [15][16][17]31,32 , resulting in obvious two-half-integer peaks. The observed onehalf-integer peaks cannot be produced by OOR, and are probably caused by La displacements 31 , which are well known to occur in bulk orthorhombic phases 14 .…”

Section: Resultsmentioning

confidence: 99%

“…Details of the sample growth, the measurements and theoretical calculation are described in Methods section. At room temperature, bulk LaMnO 3 þ d exhibits either orthorhombic structure with a À a À c þ type octahedral rotation (if Mn valence is close to 3 þ ), or rhombohedra structure with a À a À a À rotation (if Mn valence is higher) [14][15][16][17] . SrTiO 3 in bulk exhibits a cubic structure above 105 K with no octahedral rotations.…”

mentioning

confidence: 99%

“…We conducted a combined experimental and theoretical study to find the correlation between the OOR and the magnetic properties in (LaMnO 3 þ d ) N /(SrTiO 3 ) N (N ¼ 2, 3,4,6,8,16) superlattices. The maximized ferromagnetic (FM) moment is found in the N ¼ 6 superlattice accompanied by minimal octahedral rotations.…”

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confidence: 99%

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Correlating interfacial octahedral rotations with magnetism in (LaMnO3+δ)N/(SrTiO3)N superlattices

et al. 2014

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Lattice distortion due to oxygen octahedral rotations have a significant role in mediating the magnetism in oxides, and recently attracts a lot of interests in the study of complex oxides interface. However, the direct experimental evidence for the interrelation between octahedral rotation and magnetism at interface is scarce. Here we demonstrate that interfacial octahedral rotation are closely linked to the strongly modified ferromagnetism in (LaMnO 3 þ d ) N / (SrTiO 3 ) N superlattices. The maximized ferromagnetic moment in the N ¼ 6 superlattice is accompanied by a metastable structure (space group Imcm) featuring minimal octahedral rotations (a À a À c À , aB4.2°, gB0.5°). Quenched ferromagnetism for No4 superlattices is correlated to a substantially enhanced c axis octahedral rotation (a À a À c À , aB3.8°, gB8°f or N ¼ 2). Monte-Carlo simulation based on double-exchange model qualitatively reproduces the experimental observation, confirming the correlation between octahedral rotation and magnetism. Our study demonstrates that engineering superlattices with controllable interfacial structures can be a feasible new route in realizing functional magnetic materials.

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Section: Resultsmentioning

confidence: 99%

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confidence: 99%

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Correlating interfacial octahedral rotations with magnetism in (LaMnO3+δ)N/(SrTiO3)N superlattices

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“…But this field is not enough to saturate the sample. Compared with Gd 2.8 J/kg/K at 1 T field [30], DS max value is smaller for the present materials. However, these materials can be easily synthesized with good chemical stability.…”

Section: Magnetocaloric Studymentioning

confidence: 94%

Fe doping effects on the structural, magnetic, and magnetocaloric properties of nano-sized Pr0.6Bi0.4Mn1−x Fe x O3 (0.1 ≤ x ≤ 0.3) manganites

et al. 2015

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The structural, magnetic, and magentocaloric properties are systematically investigated for Pr 0.6 Bi 0.4-Mn 1-x Fe x O 3 (0.1 B x B 0.3) manganites. The samples have been synthesized by sol-gel method. X-ray diffraction (XRD), scanning electron microscopy, transmission electron microscopy, and Fourier transform infrared spectroscopy were employed to investigate the crystalline structure. Magnetization measurements were used to investigate the magnetic properties. All the samples crystallize in the orthorhombic Pnma space group as expected for manganite compounds. The presence of a PrMn 2 O 5 compound is also evidenced by XRD. The average size of the manganite particles is about 50-60 nm. Particle characterizations at the atomic level turn to be of paramount importance. Magnetic measurements versus temperature under an applied magnetic field of 0.01 T show that all samples exhibit a paramagnetic-ferromagnetic transition. Temperature-dependent magnetization measurements and Arrott analysis reveal second-first order ferromagnetic transitions for (x = 0.1 and x = 0.2). The magnetic entropy change |DS M | was estimated using Maxwell relation method and is found to reach maximum values of 0.47 and 0.37 J/kg/K under an applied magnetic field of 5 T for x = 0.1 and x = 0.2, respectively.

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“…5 The actual crystallographic formula is better written as La 1−x Mn 1−y O 3 . By varying the oxygen stoichiometry the resulting compounds display a wide variety of structural and magnetic phases, previously studied by x-rays and neutron scattering, 6,7 as well as magnetic and transport measurements. 6,8 It is well known that the low-temperature magnetic phase of non-stoichiometric LaMnO 3+δ changes from AF to FM for small values of δ due to the DE interaction caused by the presence of Mn 4+ ions in the sample.…”

Section: Introductionmentioning

confidence: 99%

Specific heat and magnetic order inLaMnO3+δ

et al. 1999

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Magnetic and specific-heat measurements are performed in three different samples of LaMnO 3+δ , with δ = 0.11, 0.15 and 0.26, presenting important disorder effects, such as carrier localization, due to high amounts of La and Mn vacancies. For the samples with δ = 0.11 and 0.15, magnetic measurements show signatures of a two-step transition: as the temperature is lowered, the system enters a ferromagnetic phase followed by a disorder-induced cluster-glass state. Spin-wave-like contributions and an unexpected large linear term are observed in the specific heat as a function of temperature. In the sample with the highest vacancy content, δ = 0.26, the disorder is sufficient to suppress even short-range ferromagnetic order and yield a spin-glass-like state.75.40. Cx, 75.30.Ds

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Influence of oxygen content on the structural, magnetotransport, and magnetic properties ofLaMnO3+δ

Cited by 338 publications

References 17 publications

Correlating interfacial octahedral rotations with magnetism in (LaMnO3+δ)N/(SrTiO3)N superlattices

Correlating interfacial octahedral rotations with magnetism in (LaMnO3+δ)N/(SrTiO3)N superlattices

Fe doping effects on the structural, magnetic, and magnetocaloric properties of nano-sized Pr0.6Bi0.4Mn1−x Fe x O3 (0.1 ≤ x ≤ 0.3) manganites

Specific heat and magnetic order inLaMnO3+δ

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