Anisotropic magnetic properties and giant rotating magnetocaloric effect in double-perovskite 
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Moon, Joon-Ho; Kim, M. K.; Oh, Dong Gun; Kim, J. H.; Shin, Hye-Sook; Choi, Young Jai; Lee, N.

doi:10.1103/physrevb.98.174424

Cited by 60 publications

(25 citation statements)

References 37 publications

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“…The periodicity of angular dependence of the MCE was found in [38,39]. Giant anisotropy of magnetocaloric effect in TbMnO 3 single crystals between different axes was found [40]. These findings relate to the first order transitions near the Curie point.…”

Section: E Anisotropy Of the H-t Phase Diagrammentioning

confidence: 63%

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Strong magnetocaloric effect induced by spin reorientation transitions in epitaxial Ho thin films

et al. 2020

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Magnetocaloric effect (MCE) in antiferromagnetic holmium (Ho) film is studied near the spin reorientation temperatures. A series of magnetization isotherms from 60 K to 150 K around the Neel temperature, T N ≈ 130 K were recorded for both in-plane and out-of-plane magnetic field orientations. A change in entropy, ∆S M of-5 J/kg K was found near T N for an in-plane field orientation. A large change in ∆S M of-11.8 J/kg K due to a fan-helix spin transition at Т = 90 K is observed for an in-plane field orientation. Spin transition at both T N and at the fan-helix transition exhibit larger MCE in the in-plane field orientations in comparison with the perpendicular orientation. The value of the refrigerant capacity extracted from the temperature dependence of ΔS M (T) is found to be larger for the "in-plane" orientation by a factor of two. I.

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Section: E Anisotropy Of the H-t Phase Diagrammentioning

confidence: 63%

“…Anisotropy of the MCE was early observed in many alloys [35][36][37][38][39][40]. It has been reported [35], that −ΔS M changes under rotating the sample in the applied magnetic field.…”

Section: E Anisotropy Of the H-t Phase Diagrammentioning

confidence: 97%

Strong magnetocaloric effect induced by spin reorientation transitions in epitaxial Ho thin films

et al. 2020

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“…We have synthesized rod-like single crystals of ECMO utilizing the conventional flux method with Bi 2 O 3 flux in air 9 , 10 , 21 . The crystallographic structure of the EFO crystals was confirmed using an X-ray diffractometer (D/Max 2500, Rigaku Corp.).…”

Section: Methodsmentioning

confidence: 99%

“…Furthermore, the additional small portion of multiferroic phase which may result from the ↑↑↓↓ spin order was observed simultaneously with the ferrimagnetic phase 22 . In Gd 2 CoMnO 6 and Tb 2 CoMnO 6 , the orders of large rare-earth magnetic moments of Gd 3+ and Tb 3+ at T Gd = 21 K and T Tb = 15 K, respectively, reveal the giant anisotropic magnetocaloric effects 9 , 10 , 32 . It is evident from the previous investigations that a detailed understanding of distinct magnetic phases and interactions is essential for examining functional properties in double perovskites.…”

Section: Introductionmentioning

confidence: 99%

Tunable magnetization steps in mixed valent ferromagnet Eu2CoMnO6

Lee

Kim

et al. 2021

Sci Rep

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Magnetic properties can be manipulated to enhance certain functionalities by tuning different material processing parameters. Here, we present the controllable magnetization steps of hysteresis loops in double-perovskite single crystals of Eu2CoMnO6. Ferromagnetic order emerges below TC ≈ 122 K along the crystallographic c axis. The difficulty in altering Co2+ and Mn4+ ions naturally induces additional antiferromagnetic clusters in this system. Annealing the crystals in different gas environments modifies the mixed magnetic state, and results in the retardation (after O2-annealing) and bifurcation (after Ar-annealing) of the magnetization steps of isothermal magnetization. This remarkable variation offers an efficient approach for improving the magnetic properties of double-perovskite oxides.

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“…The super exchanges interactions between Co 2+ and Mn 4 + give rise to fer-romagnetic ordering in most of these materials. [14] The magnates double peroskites with heavier rare earth elements shows remarkable properties like magnetization reversal and inverse exchange based in Er 2 CoMnO 6 , [15] anisotropy magnetic properties and giant magnatocaloric effect in Tb 2 CoMnO 6 , [16] negative magnatocapaictance Yb 2 CoMnO 6 have also been observed. However Ho 2 CoMnO 6 is less studied.…”

Section: Introductionmentioning

confidence: 99%

Physical properties in nano-crystalline Ho2CoMnO6

Bhatti

Bhatti²,

Mahato

et al. 2020

Ceramics International

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3d based double perovskite materials have received much attention in recent years due to their exotic magnetic structure and magneto-electric coupling. In this work we have prepared and studied the nano-crystalline sample of Ho 2 CoMnO 6 . Structural, magnetic, Raman and dielectric properties have been studied in detail. The structural analysis shows that the sample crystallize in monoclanic crystal structure with P2 1 /n phase group. The X-ray photoelectron spectroscopy have been employed to confirms the charge state of cations presents in the material. Magnetic study shows that the sample undergoes a paramagnetic to ferromagnetic phase transition around T c ∼85 K. The isothermal magnetization measurements shows hysteresis curve hence confirm ferromagnetic behavior at low temperature. Temperature dependent Raman study reveals that there is spin phonon coupling in the sample marked by deviation in phonon mode from anharmonic behavior. Dielectric response of Ho 2 CoMnO 6 shows the large dispersion and large dielectric constant. Impedance spectroscopy and electrical modulus study reveal that system shows deviation from ideal Debye model. AC conductivity have been studied as a function of both temperature and frequency. We found that the conduction mechanism is obeyed by Jonscher's model. The exponent factor n is suggest that the material deviates from ideal Debye model.

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Anisotropic magnetic properties and giant rotating magnetocaloric effect in double-perovskite Tb2CoMnO6

Cited by 60 publications

References 37 publications

Strong magnetocaloric effect induced by spin reorientation transitions in epitaxial Ho thin films

Strong magnetocaloric effect induced by spin reorientation transitions in epitaxial Ho thin films

Tunable magnetization steps in mixed valent ferromagnet Eu2CoMnO6

Physical properties in nano-crystalline Ho2CoMnO6

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