High-quality single crystal growth and spin flop of multiferroic Co4Nb2O9

Cao, Yiming; Yang, Yali; Xiang, Maolin; Feng, Zhenjie; Kang, Baojuan; Zhang, Jincang; Ren, Wei; Cao, Shixun

doi:10.1016/j.jcrysgro.2015.03.045

Cited by 28 publications

(18 citation statements)

References 26 publications

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“…The coercive magnetic field is about 1.81 kOe while the remnant polarization is 1.2 µC/m 2 . It is worth noting that the P-H curve presents an abnormal behavior in the vicinity of 7.5 kOe, which is just correspondent to the critical magnetic field of spin flop as shown in our previous work 7 . Such a consistency sufficiently proves that there indeed exists a nonlinear ME effect in the studied sample, which is originated from the change of spin configuration.…”

Section: Resultssupporting

confidence: 73%

“…If the magnetic structure corresponds to that space group, an antiferromagnetic phase transition along c -axis should be therefore observed. Surprisingly, there is no antiferromagnetic phase transition in our c -axis magnetic measurements 7 , which was also unseen by Khanh et al . 8 .…”

Section: Introductionsupporting

confidence: 82%

“…3 in ref. 7 ). Before these measurements, an ME cooling is performed under 0.1 kOe (H < H C where H C is the critical field for the occurrence of the spin-flop transition, H C ~7.5 kOe in single crystal and 11 kOe for polycrystalline samples) and 1.2 MV/m in order to ensure the same initial magnetization-polarization state of the sample.…”

Section: Resultsmentioning

confidence: 99%

“…The same sample was investigated in our previous work 7 . Magnetic properties were measured by a Physical Property Measurement System (PPMS-9, Quantum Design Inc.) with VSM (Vibrating Sample Magnetometer) option.…”

Section: Methodsmentioning

confidence: 99%

“…5 . Our former work showed that the magnetic moments of CNO are located in ab -plane 7 but not along the c -axis. Moreover, Khanh et al .…”

Section: Introductionmentioning

confidence: 94%

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Nonlinear magnetoelectric effect in paraelectric state of Co4Nb2O9 single crystal

Cao

Deng

Béran

et al. 2017

Sci Rep

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We report the structural, magnetoelectric (ME), magnetic and electric control of magnetic properties in Co4Nb2O9 (CNO) single crystal. A detailed ME measurement reveals a nonlinear ME effect instead of a linear ME effect in CNO single crystal. By fitting the magnetization-electric field (M-E) curve, it can be found that the linear () and quadratic (γ) coefficients equal to ~8.27 ps/m and ~−6.46 ps/MV for upper branch, as well as ~8.38 ps/m and ~6.75 ps/MV for the lower branch. More importantly, a pronounced response was observed under a small cooling magnetic field, which cannot even cause the spin flop. This suggests a magnetoelectric effect can occur at paraelectric state for CNO single crystal. Furthermore, we also found that the magnetization of every axis responds to electric field applied along a-axis, but fails to do so when the electric field is applied c-axis. Such findings supply a direct evidence to the magnetic structure and ME coupling mechanism indirectly reflected by our neutron experiment.

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Section: Resultssupporting

confidence: 73%

Section: Introductionsupporting

confidence: 82%

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

“…5 . Our former work showed that the magnetic moments of CNO are located in ab -plane 7 but not along the c -axis. Moreover, Khanh et al .…”

Section: Introductionmentioning

confidence: 94%

See 3 more Smart Citations

Nonlinear magnetoelectric effect in paraelectric state of Co4Nb2O9 single crystal

Cao

Deng

Béran

et al. 2017

Sci Rep

Self Cite

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Structural, magnetic and magnetoelectric properties of Co₂Fe₂Ta₂O₉, a T_N=53 K honeycomb antiferromagnet

Maignan

Martin

2022

Zeitschrift anorg allge chemie

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The bimetallic oxides of general M4M’2O9 formula, where M=Fe, Co, Mn and M’=Nb or Ta, form a family of linear magnetoelectric materials, for which properties depend on the nature of the M,M’ pair. In the present study, the structural, magnetic and magnetoelectric properties of a new member, Co2Fe2Ta2O9, synthesized in polycrystalline form, are reported. This compound crystallizing in the P‐3c1 trigonal ‘429’ structure (a=5.2009 (1) Å, c=14.1986(1) Å and V=332.613(2) Å3) is found to be antiferromagnetic below TN=53 K. Although the structural features are intermediate between the Co4Ta2O9 and Fe4Ta2O9 limit members, a very different magnetoelectric behaviour is observed. In order to reveal the differences between M4M’2O9 with M=Fe or Co or mixed and M’=Ta or Nb, a comparison between these six compounds is proposed.

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Enhancing the magnetoelectric coupling of Co4Nb2O9[100] by substituting Mg for Co

Cao

Wang

et al. 2018

Front. Phys.

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We report experimental studies on enhancing the magnetoelectric (ME) coupling of Co 4 Nb 2 O 9 by substitution of non-magnetic metal Mg for Co. A series of single crystal Co 4-x Mg x Nb 2 O 9 (x=0, 1, 2, 3) with a single-phase corundum-type structure are synthesized by the optical floating zone method, and the good quality and crystallographic orientations of the synthesized samples are confirmed by Laue spots and sharp XRD peaks. Although the Né el temperature (T N ) of the Mg substituted crystals are slightly decreased from 27 K for pure Co 4 Nb 2 O 9 to 19 K and 11 K for Co 3 MgNb 2 O 9 and Co 2 Mg 2 Nb 2 O 9 , respectively, the ME coupling is double enhanced by Mg substitution when x=1. For the magnetic field (electric field) control of electric polarization (magnetization), the ME coefficient  ME of Co 3 MgNb 2 O 9 is measured to be 12.8 ps/m (13.7 ps/m). These results indicate that the Mg substituted Co 4-x Mg x Nb 2 O 9 (x=1) could serve as a potential material candidate for applications in future logic spintronics and logic devices.

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High-quality single crystal growth and spin flop of multiferroic Co4Nb2O9

Cited by 28 publications

References 26 publications

Nonlinear magnetoelectric effect in paraelectric state of Co4Nb2O9 single crystal

Nonlinear magnetoelectric effect in paraelectric state of Co4Nb2O9 single crystal

Structural, magnetic and magnetoelectric properties of Co₂Fe₂Ta₂O₉, a T_N=53 K honeycomb antiferromagnet

Enhancing the magnetoelectric coupling of Co4Nb2O9[100] by substituting Mg for Co

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High-quality single crystal growth and spin flop of multiferroic Co4Nb2O9

Cited by 28 publications

References 26 publications

Nonlinear magnetoelectric effect in paraelectric state of Co4Nb2O9 single crystal

Nonlinear magnetoelectric effect in paraelectric state of Co4Nb2O9 single crystal

Structural, magnetic and magnetoelectric properties of Co2Fe2Ta2O9, a TN=53 K honeycomb antiferromagnet

Enhancing the magnetoelectric coupling of Co4Nb2O9[100] by substituting Mg for Co

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Structural, magnetic and magnetoelectric properties of Co₂Fe₂Ta₂O₉, a T_N=53 K honeycomb antiferromagnet