Evidence of Exchange-Bias-Like Phenomenon in GdFe/TbFe/GdFe Domain Wall Junctions

Mangin, Stéphane; Marchal, G.; Barbara, B.

doi:10.1103/physrevlett.82.4336

Cited by 56 publications

(40 citation statements)

References 17 publications

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“…At 10 K, maxima and minima appear in the magnetoresistance at high fields when the SRO layers reverse. There are no corresponding features at low fields at this temperature, since in this sample the magnetically soft LSMO layers form an exchange spring magnet coupled to the magnetically hard SRO layers [11], such that the LSMO layers rotate gradually with respect to the SRO layers when the applied field is varied [8]. This interpretation is in agreement with the observation that the magnetoresistance is reversible during a minor loop, see symbols in Fig.…”

Section: Experimental Lsmo/sro Superlattices (Sls)supporting

confidence: 79%

A spin‐calorics device based on La_0.7Sr_0.3MnO₃/SrRuO₃ superlattices

Ziese

2011

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High quality La0.7Sr0.3MnO3/SrRuO3 superlattices with ultrathin individual layers were grown by pulsed laser deposition and were studied by magnetometry and magnetoresistance measurements. Depending on layer thickness and structural quality, exchange biasing could be observed both in magnetization and magnetotransport. In this regime the superlattice magnetization forms an exchange spring that leads to a reversible field dependence of the magnetoresistance and the magnetic work. It is shown that the magnetic work and the magnetocaloric effect can be tuned by the SrRuO3 layer thickness. This opens up the possibility of fabricating spin‐caloric devices from wedge‐shaped superlattices with self‐sustaining Seebeck effect. (© 2011 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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Section: Experimental Lsmo/sro Superlattices (Sls)supporting

confidence: 79%

A spin‐calorics device based on La_0.7Sr_0.3MnO₃/SrRuO₃ superlattices

Ziese

2011

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“…In principle, the LSMO-SRO superlattices constitute hard-soft ferromagnetic systems such that the existence of exchange spring effects [43,44] might be anticipated. These, however, do only occur in a minority of samples; in the samples investigated by us two types of magnetization reversal processes occur.…”

Section: Exchange Bias Strength and Inverted Hysteresis Loopsmentioning

confidence: 99%

Properties of manganite/ruthenate superlattices with ultrathin layers

Ziese

Vrejoiu

2013

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The properties of manganite/ruthenate superlattices are reviewed with a specific focus on the manganite/ruthenate interface. La0.7Sr0.3MnO3/SrRuO3 and Pr0.7Ca0.3MnO3/SrRuO3 superlattices grow with a high crystalline perfection as illustrated in the figure to the right: at the interface the individual cation species can be clearly identified, interdiffusion is marginal. The superlattices show magnetization processes with an intricate interplay between magnetocrystalline anisotropy, size of the layer magnetization, spin confinement and interfacial antiferromagnetic interlayer coupling. There is further an unprecedented Curie temperature stabilization at room temperature values of the La0.7Sr0.3MnO3 layers in the superlattices down to layer thicknesses of one unit cell. The magnetotransport properties, especially the Hall effect, indicate the existence of a quasi‐two‐dimensional hole gas at the La0.7Sr0.3MnO3/SrRuO3 interface; this is further supported by an analysis of cation displacements as determined from scanning transmission electron microscopy. The manganite/ruthenate interface might be considered as a model system for the study of interfacial reconstruction and charge transfer in a highly correlated ferromagnetic system.magnified imageHAADF‐STEM micrograph of two La0.7Sr0.3MnO3/SrRuO3 interfaces in a superlattice with four unit cell thick La0.7Sr0.3MnO3 and eight unit cell thick SrRuO3 layers. The spheres indicate the cations as determined from the Z‐contrast.(© 2013 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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“…Notably, Mangin and colleagues [17][18][19][20] have performed significant work on GdFe/TbFe ferrimagnetic soft/hard bilayers with in-plane anisotropy in which EB effects occur. EB was also studied in all coupled FM films with in-plane magnetized ferromagnets acting as pinning layers 21,22 .…”

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confidence: 99%

Perpendicular exchange bias in ferrimagnetic spin valves

et al. 2012

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The exchange bias effect refers to the shift of the hysteresis loop of a ferromagnet in direct contact to an antiferromagnet. For applications in spintronics a robust and tunable exchange bias is required. Here we show experimental evidence for a perpendicular exchange bias in a prototypical ferrimagnetic spin valve consisting of DyCo 5 /Ta/Fe 76 Gd 24 , where the DyCo 5 alloy has the role of a hard ferrimagnet and Fe 76 Gd 24 is a soft ferrimagnet. Taking advantage of the tunability of the exchange coupling between the ferrimagnetic layers by means of thickness variation of an interlayer spacer, we demonstrate that perpendicular unidirectional anisotropy can be induced with desirable absolute values at room temperature, without making use of a field-cooling procedure. moreover, the shift of the hysteresis loop can be reversed with relatively low magnetic fields of several hundred oersteds. This flexibility in controlling a robust perpendicular exchange bias at room temperature may be of crucial importance for applications.

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Evidence of Exchange-Bias-Like Phenomenon in GdFe/TbFe/GdFe Domain Wall Junctions

Cited by 56 publications

References 17 publications

A spin‐calorics device based on La_0.7Sr_0.3MnO₃/SrRuO₃ superlattices

A spin‐calorics device based on La_0.7Sr_0.3MnO₃/SrRuO₃ superlattices

Properties of manganite/ruthenate superlattices with ultrathin layers

Perpendicular exchange bias in ferrimagnetic spin valves

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Evidence of Exchange-Bias-Like Phenomenon in GdFe/TbFe/GdFe Domain Wall Junctions

Cited by 56 publications

References 17 publications

A spin‐calorics device based on La0.7Sr0.3MnO3/SrRuO3 superlattices

A spin‐calorics device based on La0.7Sr0.3MnO3/SrRuO3 superlattices

Properties of manganite/ruthenate superlattices with ultrathin layers

Perpendicular exchange bias in ferrimagnetic spin valves

Contact Info

Product

Resources

About

A spin‐calorics device based on La_0.7Sr_0.3MnO₃/SrRuO₃ superlattices

A spin‐calorics device based on La_0.7Sr_0.3MnO₃/SrRuO₃ superlattices