Magnetic field induced ferroelectric loop in Bi0.75Sr0.25FeO3−δ

Kundys, B.; Maignan, A.; Martin, C.; Nguyen, N.; Simon, Charles

doi:10.1063/1.2890714

Cited by 84 publications

(34 citation statements)

References 31 publications

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“…It is due to random doping of Ga ions in rhombohedral planes containing Fe ions and distribution of magnetic exchange interactions. B. Kundys et al 27 attributed similar magnetic field induced NDR effect in Bi 0.75 Sr 0.25 FeO 3 system to coexistence of antiferromagnetic and weak ferromagnetic interactions. In Ga doped hematite system, we noted a good signature of ferroelectricity in the nearby composition (α-Fe 1.6 Ga 0.4 O 3 ) and prepared by mechanical alloying.…”

Section: Summary Of the Results And Discussionmentioning

confidence: 94%

“…In NDR regime, the I-V curve showed non-ohmic character where current decreases with increase of voltage to achieve a current valley at voltage V m . In the high voltage ohmic regime (HOR) at V > V m , the current once again increases with the increase of voltage up to 10 V. The NDR effect is useful for applying materials in spintronics devices, [26][27][28][29] especially in memory and switching devices. 30,31 We have shown in Fig.…”

Section: B I-v Curves Measurement In the Presence Of Magnetic Field mentioning

confidence: 99%

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Magnetic field cycling effect on the non-linear current-voltage characteristics and magnetic field induced negative differential resistance in α-Fe1.64Ga0.36O3 oxide

Bhowmik

Vijayasri

2015

AIP Advances

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We have studied current-voltage (I-V) characteristics of α-Fe1.64Ga0.36O3, a typical canted ferromagnetic semiconductor. The sample showed a transformation of the I-V curves from linear to non-linear character with the increase of bias voltage. The I-V curves showed irreversible features with hysteresis loop and bi-stable electronic states for up and down modes of voltage sweep. We report positive magnetoresistance and magnetic field induced negative differential resistance as the first time observed phenomena in metal doped hematite system. The magnitudes of critical voltage at which I-V curve showed peak and corresponding peak current are affected by magnetic field cycling. The shift of the peak voltage with magnetic field showed a step-wise jump between two discrete voltage levels with least gap (ΔVP) 0.345(± 0.001) V. The magnetic spin dependent electronic charge transport in this new class of magnetic semiconductor opens a wide scope for tuning large electroresistance (∼500-700%), magnetoresistance (70-135 %) and charge-spin dependent conductivity under suitable control of electric and magnetic fields. The electric and magnetic field controlled charge-spin transport is interesting for applications of the magnetic materials in spintronics, e.g., magnetic sensor, memory devices and digital switching.

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Section: Summary Of the Results And Discussionmentioning

confidence: 94%

Section: B I-v Curves Measurement In the Presence Of Magnetic Field mentioning

confidence: 99%

Magnetic field cycling effect on the non-linear current-voltage characteristics and magnetic field induced negative differential resistance in α-Fe1.64Ga0.36O3 oxide

Bhowmik

Vijayasri

2015

AIP Advances

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“…16 Interestingly, divalent cation (A) substituted Bi 0.7 A 0.3 FeO 3 (A = Ca, Sr, Pb, and Ba) also exhibits enhanced magnetization 17 and the recent observation of magnetic-field induced ferroelectric hysteresis loop in Bi 0.75 Sr 0.25 FeO 3-δ makes it more attractive for practical applications. 18 Although the temperature dependence of structural and magnetic order parameters of BiFeO 3 has been studied by Fischer et al long ago 19 , the magnetic measurements over a wide range of temperature (10 K -700 K) as well as magnetoelectric coupling in Bi 0.7 A 0.3 FeO 3 have not been reported and these are the driving factors for the work reported here. with X-ray diffraction (XRD) experiment (Philips X' pert Pro) using Cu Kα radiation.…”

Section: Introductionmentioning

confidence: 82%

Magnetic and magnetoelectric studies in pure and cation doped

Naik

Mahendiran

2009

Solid State Communications

124

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We report the effect of divalent cation (A) substitution on magnetic and magnetoelectric properties in Bi 1-x A x FeO 3 (A= Sr, Ba and Sr 0.5 Ba 0.5 ; x = 0 and 0.3). The rapid increase of magnetization below 100 K and a peak at the Neel temperature T N = 642±2 K found in BiFeO 3 is suppressed in the co-doped sample (A = Sr 0.15 Ba 0.15 ). All the divalent cation doped samples show enhanced magnetization with a well defined hysteresis loop compared to the parent compound. Both longitudinal (L-α ME ) and transverse (T-α ME ) magnetoelectric coefficients with dc magnetic field parallel and perpendicular to the direction of induced voltage, respectively, were measured using dynamic lock-in technique. It is found that the T-α ME increases in magnitude and exceeds the L-α ME with increasing size of the A cation. The maximum T-α ME = 2.1 mV/cmOe in the series is found for A = Sr 0.15 Ba 0.15 , though it is not the compound with the highest saturation magnetization. The observed changes in the magnetoelectric coefficient are suggested to possible modification in the domain structure and magnetoelectric coupling in these compounds.1

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“…It has to be noted that, similarly, magnetic field induced ferroelectric loop has recently been found in Sr substituted BiFeO 3 accompanied with no magnetocapacitance effect in this compound. 28 In conclusion, a quasistatic technique has been used to investigate ferroelectric properties of a single crystal of MnWO 4 . It was shown that the sample is indeed ferroelectric and that the shape of its ferroelectric loop strongly depends on both temperature and magnetic field.…”

mentioning

confidence: 99%

Effect of magnetic field and temperature on the ferroelectric loop inMnWO4

Kundys
¹
,

Simon
²
,

Martin
³

2008

Phys. Rev. B
Self Cite

46
5
37
0

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The ferroelectric properties of MnWO 4 single crystal have been investigated. Despite a relatively low remanent polarization, we show that the sample is ferroelectric. The shape of the ferroelectric loop of MnWO 4 strongly depends on magnetic field and temperature. While its dependence does not directly correlate with the magnetocapacitance effect before the paraelectric transition, the effect of magnetic field on the ferroelectric polarization loop supports magnetoelectric coupling.PACS number͑s͒: 72.55.ϩs, 75.80.ϩq, 75.30.Kz The mutually exclusive nature of magnetism and electric polarization phenomena in most solids 1,2 has recently attracted attention in the scientific community. This is essentially due to both the basic physics challenges posed and the possible magnetoelectric ͑ME͒ applications for memory storage and electric field-controlled magnetic sensors. The idea of having the two order parameters ͑magnetic and electric͒ at the same temperature and magnetically controlled electrical polarization ͑or vice versa͒ has stimulated a vast research of new materials, 3-8 as well as reinvestigation of previously known compounds. 9 It becomes evident that many canted antiferromagnets may develop electric polarization as a result of the overlap of the electronic wave functions and as a result of the spin orbit interaction. 10 Among materials in which magnetoelectric effects have been recently reported, MnWO 4 is a particularly interesting material as the electric polarization in a single crystal may be switched from the b to a direction when a strong magnetic field is applied. 11-14 A similar phenomenon has been observed in rare-earth manganites. 15,16 The antiferromagnetic ͑AF͒ phase transitions of MnWO 4 were already studied a long time ago. 17,18 With decreasing temperature, MnWO 4 undergoes a collinear antiferromagnetic state ͑AF1 phase͒ at T N Ϸ 13.5 K with further transformation to the noncollinear incommensurate antiferromagnetic phase ͑AF2 phase͒ at 12.7 K, and finally to collinear incommensurate antiferromagnetic phase ͑AF3 phase͒ at 7.6 K. Among the three antiferromagnetic states, only the noncollinear one ͑AF2 phase͒ appears to develop an electric polarization that can be explained within the framework of the phenomenological 10,19-21 and microscopic models. 22 Polarity alone, however, does not guarantee ferroelectricity that is sometimes difficult to experimentally demonstrate. 9,23 For example, the reversibility of the electric dipoles could require electric fields larger than the breakdown field, or it might be due to asymmetric irreversible arrangements of the atoms. In this Brief Report, the electric field-induced dipole reversibility ͑ferroelectricity͒ of MnWO 4 is shown, along with the measures of its dependence on magnetic field and temperature. dc ferroelectric measurements were performed in a Physical Property Measurement System ͑PPMS͒ Quantum Design cryostat by using a Keithley 6517A electrometer. The used technique is our adaptation of the already known method, 24 wherein programming te...

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Magnetic field induced ferroelectric loop in Bi0.75Sr0.25FeO3−δ

Cited by 84 publications

References 31 publications

Magnetic field cycling effect on the non-linear current-voltage characteristics and magnetic field induced negative differential resistance in α-Fe1.64Ga0.36O3 oxide

Magnetic field cycling effect on the non-linear current-voltage characteristics and magnetic field induced negative differential resistance in α-Fe1.64Ga0.36O3 oxide

Magnetic and magnetoelectric studies in pure and cation doped

Effect of magnetic field and temperature on the ferroelectric loop inMnWO4

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