Exchange-coupling 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">La</mml:mi></mml:mrow><mml:mrow><mml:mn>1</mml:mn><mml:mi>−</mml:mi><mml:mi>x</mml:mi></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Ca</mml:mi></mml:mrow><mml:mrow><mml:mi>x</mml:mi></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">MnO</mml:mi></mml:mrow><mml

Moutis, N.; Christides, C.; Panagiotopoulos, I.; Niarchos, D.

doi:10.1103/physrevb.64.094429

Cited by 94 publications

(62 citation statements)

References 38 publications

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“…This exponential temperature dependence has previously been observed in diverse systems such as manganite nanoparticles, bilayer, and superlattices, 26,29,42,43 which can be ascribed to the competing magnetic interactions and spin frustration at the interfaces. In contrast, H C deviates from this exponential law at low temperatures (Figure 6(b)), suggesting that H E and H C in the low-temperature regime do not share exactly the same origin.…”

supporting

confidence: 53%

“…[16][17][18][19][20][21][22] In particular, exchange bias, as a prototypical interfacial magnetic interaction between different spin orders, was reported in some manganite-based heterostructures and SLs. [23][24][25][26][27][28][29] Unlike CMR manganites such as La 0.7 Sr 0.3 MnO 3 (LSMO) where double exchange interactions lead to collinear ferromagnetism and metallic states, rare-earth manganite TbMnO 3 (TMO) offers multiferroic properties, coupling ferroelectric and magnetic orders. [30][31][32] As a result of the competing exchange interactions, TMO displays sinusoidal antiferromagnetic Mn 3þ spin ordering at the Neel temperature T N $ 41 K, spiral Mn 3þ spin ordering at the ferroelectric transition temperature T lock $ 28 K, and long range ferromagnetic Tb 3þ spin ordering below T Tb $ 7 K. Orthorhombic-structured TMO is compatible with other perovskites, and epitaxial thin films have been fabricated.…”

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confidence: 99%

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Interfacial magnetic coupling in ultrathin all-manganite La0.7Sr0.3MnO3-TbMnO3 superlattices

Tian

Lebedev

Roddatis

et al. 2014

Applied Physics Letters

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supporting

confidence: 53%

mentioning

confidence: 99%

Interfacial magnetic coupling in ultrathin all-manganite La0.7Sr0.3MnO3-TbMnO3 superlattices

Tian

Lebedev

Roddatis

et al. 2014

Applied Physics Letters

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“…However, the size of the SPM particle is not rigidly bound with the crystalline cluster and is controlled by an applied magnetic field, contradicting to the underlying principles of the theoretical models for an ensemble of the SPM particles. The similar unusual FC M T ( ) behavior was observed already in the La 1-x Ca x MnO 3 FM/AFM multilayers and explained by the thermal instability of different exchange paths, first of all, a spin-flop transition in AFM grains under an applied magnetic field [18]. However, in our case both the FC and ZFC M T ( ) curves demonstrate an unsplitted exponential behavior, beginning from the lowest applied magnetic field, except for the temperature range below T B .…”

Section: Discussionsupporting

confidence: 75%

Nonclassical magnetic dynamics and negative exchange bias in Nd0.5Sr0.5MnO3 films

Prokhorov

Kaminsky

Komashko

et al. 2007

Low Temperature Physics

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The amorphous, nanoclustered, and self-organizing bilayered Nd Sr MnO 0.5 0.5 3 films have been prepared by a rf-magnetron sputtering. The amorphous film turn out to be a typical paramagnet with a freely moving of the individual Mn spins, the magnetic properties of which are well described by the Curie-Weiss approximation. The nanoclustered film manifests the magnetic properties mimic to the superparamagnetic particles with a nonclassical magnetic dynamics. Taking into account the unique shape of the hysteresis loops, which have hysteretic lobes at high magnetic field but are nonhysteretic as the field crosses zero, we suggest that each particle (nanocluster) is the closure magnetic domain (or magnetic vortex) rather than the single one. At the same time, the blocked to unblocked transition was observed with increasing temperature similar to the usual superparamagnet. The self-organizing bilayered film demonstrates a negative exchange bias, which is typical for the ferromagnet/antiferromagnet hybrid system in spite of that both layers in our case have a ferromagnetic origin. The magnetic properties of the films are discussed in detail on the base of modern theoretical models.

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“…10). Such a behavior is considered as a fingerprint that the origin of the H EB and H C is due to the existence of spin frustration, and has been previously reported not only in LSMO / SMO bilayers 47 50 and Co / CuMn bilayers. 51 In Fig.…”

mentioning

confidence: 69%

Nature of antiferromagnetic order in epitaxially strained multiferroicSrMnO3thin films

et al. 2015

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Epitaxial films of SrMnO3 and bilayers of SrMnO3 / La0.67Sr0.33MnO3 have been deposited by pulsed laser deposition on different substrates, namely LaAlO3 (001), (LaAlO3)0.3(Sr2AlTaO6)0.7 (001) and SrTiO3 (001), allowing us to perform an exhaustive study of the dependence of antiferromagnetic order and exchange bias field on epitaxial strain. The Néel temperatures (TN ) of the SrMnO3 films have been determined by low energy muon spin spectroscopy. In agreement with theoretical predictions, TN is reduced as the epitaxial strain increases. From the comparison with first-principle calculations, a crossover from G-type to C-type antiferromagnetic orders is proposed at a critical tensile strain of around 1.6 ± 0.1 %. The exchange bias (coercive) field, obtained for the bilayers, increases (decreases) by increasing the epitaxial strain in the SrMnO3 layer, following an exponential dependence with temperature. Our experimental results can be explained by the existence of a spin-glass (SG) state at the interface between the SrMnO3 and La0.67Sr0.33MnO3 films. This SG state is due to the competition between the different exchange interactions present in the bilayer and favored by increasing the strain in SrMnO3 layer.

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Exchange-coupling properties ofLa1−xCaxMnO

Cited by 94 publications

References 38 publications

Interfacial magnetic coupling in ultrathin all-manganite La0.7Sr0.3MnO3-TbMnO3 superlattices

Interfacial magnetic coupling in ultrathin all-manganite La0.7Sr0.3MnO3-TbMnO3 superlattices

Nonclassical magnetic dynamics and negative exchange bias in Nd0.5Sr0.5MnO3 films

Nature of antiferromagnetic order in epitaxially strained multiferroicSrMnO3thin films

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