Positive to negative zero-field cooled exchange bias in La0.5Sr0.5Mn0.8Co0.2O3 ceramics

Shang, Cui; Guo, S.; Wang, Ruilong; Sun, Zhigang; Xiao, Haibo; Xu, Lingfang; Yang, Changping; Xia, Zhengcai

doi:10.1038/srep25703

Cited by 24 publications

(5 citation statements)

References 34 publications

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“…Moreover, at RT, we observed a transition from negative to positive exchange bias with decreasing H max to record the respective hysteresis loops. A similar transition was observed in La 0.5 Sr 0.5 Mn 0.8 Co 0.2 O 3 ceramics at temperature much lower than RT [49]. We have also carried out the temperature dependent ZFC and FC magnetization measurements of undoped, Gd doped and Gd-Ti co-doped BFO bulk samples in the presence of 500 Oe applied magnetic field.…”

Section: B Magnetic Characterizationsupporting

confidence: 73%

“…[20]. Previously, EB effect has been observed in various bulk materials, however, this effect in most cases was limited to far below RT (< 100 K) [47][48][49] making the systems less lucrative for applications. Therefore, the observation of EB in this co-doped BFO multiferroics up to RT, albeit small, is promising from the perspective of practical applications.…”

Section: B Magnetic Characterizationmentioning

confidence: 99%

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The 10% Gd and Ti co-doped BiFeO3: A promising multiferroic material

Basith

Billah

Jalil

et al. 2017

Journal of Alloys and Compounds

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In this investigation, undoped BiFeO3, Gd doped Bi0.9Gd0.1FeO3, and Gd-Ti co-doped Bi0.9Gd0.1Fe1−xTixO3 (x = 0.10, 0.20) materials were synthesized to report their multiferroic properties. The structural analysis and phase identification of these multiferroic ceramics were performed using Rietveld refinement. The Rietveld analysis has confirmed the high phase purity of the 10% Gd-Ti co-doped Bi0.9Gd0.1Fe0.9Ti0.1O3 sample compared to that of other compositions under investigation. The major phase of this particular composition is of rhombohedral R3c type structure (wt% > 99%) with negligible amount of impurity phases. In terms of characterization, we address magnetic properties of this co-doped ceramic system by applying substantially higher magnetic fields than that applied in previously reported investigations. The dependence of temperature and maximum applied magnetic fields on their magnetization behavior have also been investigated. Additionally, the leakage current density has been measured to explore its effect on the ferroelectric properties of this multiferroic system. The outcome of this investigation suggests that the substitution of 10% Gd and Ti in place of Bi and Fe, respectively, in BiFeO3 significantly enhances its multiferroic properties. The improved properties of this specific composition is associated with homogeneous reduced grain size, significant suppression of impurity phases and reduction in leakage current density which is further asserted by polarization vs. electric field hysteresis loop measurements.

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Section: B Magnetic Characterizationsupporting

confidence: 73%

Section: B Magnetic Characterizationmentioning

confidence: 99%

The 10% Gd and Ti co-doped BiFeO3: A promising multiferroic material

Basith

Billah

Jalil

et al. 2017

Journal of Alloys and Compounds

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“…However, there are few examples where an asymmetry in M(H) loop has been observed toward positive field axis even after cooling in zero magnetic field, which is rather surprising and unconventional. [20,21,22] Since its discovery, EB effect has been studied extensively following its possible application in spintronics. Obviously, artificially fabricated superlattices offer an ideal system to study the EB effect not only because an individual layer of particular magnetic state can be chosen but also interface plays a crucial role here with its easy modified magnetic character.…”

Section: Introductionmentioning

confidence: 99%

Interface induced exchange bias effect in La0.67Sr0.33MnO3/SrIrO3 multilayer

2019

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Epitaxial superlattices of ferromagnetic/paramagnetic La 0.67 Sr 0.33 MnO 3 /SrIrO 3 materials have been prepared on SrTiO 3 (100) substrate using pulse laser deposition technique. An unexpected onset of interface magnetic interaction has been observed around 40 K. Interestingly, magnetic exchange bias effect has been observed in both field cooled and zero field cooled magnetization loops, however, the shifting of loop is opposite in both measurements. Exchange bias field vanishes as temperature increases to interface magnetic ordering temperature. Moreover, exchange bias field is found to decrease with increasing cooling field. We believe that tuning of magnetic exchange at interface during field cooling induces this evolution in nature of exchange bias field.

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“…In contrast, zero-field-cooled exchange bias (ZEB) is a unique finding of condensed matter physics, as it is observed in some magnetic materials without having any bias cooling field. Recently, this kind of EB effect is observed in some metallic alloys [9,10] and oxides [11][12][13]. Experimental observations suggest that the formation of SG phase, presence of FM clusters and field induced magnetic phase transition are the possible reasons for the observation of ZEB effect in this kind of material.…”

Section: Introductionmentioning

confidence: 89%

Exchange bias effect in a finite site disordered canted antiferromagnet

Pradhan

Dalal

2018

J. Phys.: Condens. Matter

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We report the temperature and magnetic field dependent magnetic properties of the single-phase polycrystalline LaSrCrRuO sample to explore the intrinsic magnetic phases of the sample. Our combined temperature and field dependent magnetization studies reveal the formation of ferromagnetic (FM) cluster-glass in the antiferromagnetic (AFM) matrix of host LaCrO. Interestingly, the as-studied sample exhibits both zero-field-cooled (horizontal shift) and field-cooled (vertical shift) exchange bias effects and, in both cases, magnitude of exchange bias field continuously increases with the decrease of temperature. Our successive hysteresis loop measurements completely ruled out the effect of any minor hysteresis loop and thus, establishes this vertical shift as conventional field-cooled exchange bias (CEB) effect, originating from the uncompensated spins of randomly substituted canted AFM spin structure. A significantly larger value of CEB field (7.5 kOe) at 5 K is achieved for a cooling field of 50 kOe, not usually observed in conventional FM/AFM interfacial exchange-bias systems.

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Positive to negative zero-field cooled exchange bias in La0.5Sr0.5Mn0.8Co0.2O3 ceramics

Cited by 24 publications

References 34 publications

The 10% Gd and Ti co-doped BiFeO3: A promising multiferroic material

The 10% Gd and Ti co-doped BiFeO3: A promising multiferroic material

Interface induced exchange bias effect in La0.67Sr0.33MnO3/SrIrO3 multilayer

Exchange bias effect in a finite site disordered canted antiferromagnet

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