Magnetic properties, x-ray absorption spectroscopy and electronic structure of GdCrTiO5

Guedes, E. B.; Martins, Henrique Perin; Abbate, M.; Masunaga, Sueli H.; Ramirez, F. E. N.; Jardim, R. F.; Mossanek, R. J. O.

doi:10.1016/j.jallcom.2017.06.335

Cited by 9 publications

(14 citation statements)

References 27 publications

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“…They demonstrated the onset of long-range magnetic order of the Gd spins at 0.9 K and suggested non-collinear antiferromagnetic ordering in this system. This recent report 28 supports our interpretation of the magnetic properties of GdCrTiO 5 . Hence, our study confirms that dielectric and pyroelectric measurements are very sensitive to capture such weak or metastable H-induced transitions, especially in the case of strong ME coupling.…”

Section: 26supporting

confidence: 90%

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Complex nature of magnetic field induced ferroelectricity in GdCrTiO5

et al. 2017

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This work shows an unconventional route for spin-driven ferroelectricity originating from a metastable magnetic field-induced canting of the chromium sublattice in the presence of gadolinium moments in GdCrTiO 5 at low temperatures. Compared to the isostructural neodymium compound, significant differences of magnetism and magnetoelectric effects are seen. We present the results of thorough investigations of temperature and magnetic field dependent magnetization as well as ac and dc magnetic susceptibility. These bulk measurements are complemented by local-probe spectroscopy utilizing electron-spin resonance and muon-spin rotation/relaxation for probing the chromium moments.Ferroelectric order is inferred from pyro-and magnetocurrent measurements. GdCrTiO 5 shows a pyrocurrent signal around 10 K, only if the system is cooled in an applied magnetic field exceeding 10 kOe. A distinct spin-driven ferroelectric order is revealed in this state for temperatures below 10 K, which can be switched by changing the magnetic-field direction and the polarity of the electric field. The magnetic measurements reveal no clear signature of long-range magnetic ordering. The presence of such 'meta-magnetoelectric-type' behaviour

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Section: 26supporting

confidence: 90%

“…While our manuscript was under review, a manuscript has been published by Guedes et al 28 reporting on the magnetism of GdCrTiO 5 . They demonstrated the onset of long-range magnetic order of the Gd spins at 0.9 K and suggested non-collinear antiferromagnetic ordering in this system.…”

Section: 26mentioning

confidence: 99%

Complex nature of magnetic field induced ferroelectricity in GdCrTiO5

et al. 2017

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“…We have also calculated the zero-field magnetic entropy from the reported heat capacity data at low-temperature (0.05-20 K) and observe that the obtained value is very close to that of ours. 42 To check the consistency in our results on magnetic entropy change estimated from M (H) data, ∆S m has also been calculated independently from the field dependence of heat capacity using the relation…”

Section: Resultsmentioning

confidence: 85%

“…Similar weak anomaly in C p has been reported earlier and attributed to short-range AFM ordering of Cr 3+ spins. 42 The nature of anomaly suggests that the transition is very weak and the entropy associated with this transition is negligible. The increase of C p at low temperature indicates the onset of long-range ordering of Gd 3+ sublattice below 1.8 K. Indeed, temperature dependence of specific heat reveals a pronounced peak at 0.9 K due to the Gd moment ordering.…”

Section: Resultsmentioning

confidence: 99%

“…41 Due to strong frustration, the Gd moments order at very low temperature, T N =0.9 K, whereas the Cr moments do not show any long-range ordering. 40,42 To the best of our knowledge, there is no report on large MCE for such type of exchange frustrated magnets. Also, GdCrTiO 5 is electrically insulating and magnetization does not show thermal and field hysteresis which are important criteria in magnetic refrigerant.…”

Section: Introductionmentioning

confidence: 99%

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Giant magnetocaloric effect in an exchange-frustrated GdCrTiO5 antiferromagnet

et al. 2018

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We report the effect of exchange frustration on the magnetocaloric properties of GdCrTiO5 compound. Due to the highly exchange-frustrated nature of magnetic interaction, in GdCrTiO5, the long-range antiferromagnetic ordering occurs at much lower temperature TN =0.9 K and the magnetic cooling power enhances dramatically relative to that observed in several geometrically frustrated systems. Below 5 K, isothermal magnetic entropy change (-∆Sm) is found to be 36 J kg −1 K −1 , for a field change (∆H) of 7 T. Further, -∆Sm does not decrease from its maximum value with decreasing in T down to very low temperatures and is reversible in nature. The adiabatic temperature change, ∆T ad , is 15 K for ∆H=7 T. These magnetocaloric parameters are significantly larger than that reported for several potential magnetic refrigerants, even for small and moderate field changes. The present study not only suggests that GdCrTiO5 could be considered as a potential magnetic refrigerant at cryogenic temperatures but also promotes further studies on the role of exchange frustration on magnetocaloric effect. In contrast, only the role of geometrical frustration on magnetocaloric effect has been previously reported theoretically and experimentally investigated on very few systems. arXiv:1805.02056v1 [cond-mat.mtrl-sci]

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Magnetic and magnetoelectric properties of NdCrTiO 5 revealed by systematically rare-earth doping

Feng

Cheng

et al. 2018

Journal of Magnetism and Magnetic Materials

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Magnetic properties, x-ray absorption spectroscopy and electronic structure of GdCrTiO5

Cited by 9 publications

References 27 publications

Complex nature of magnetic field induced ferroelectricity in GdCrTiO5

Complex nature of magnetic field induced ferroelectricity in GdCrTiO5

Giant magnetocaloric effect in an exchange-frustrated GdCrTiO5 antiferromagnet

Magnetic and magnetoelectric properties of NdCrTiO 5 revealed by systematically rare-earth doping

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