A comparative study on magnetic behaviors and magnetocaloric effect in heavy rare-earth antiferromagnetic orthoferrites RFeO3 (R = Dy, Ho and Er)

Li, Canglong; Zheng, Shuangshuang; Barasa, Godfrey Okumu; Zhao, Yan; Wang, L.; Wang, C.L.; Lu, Yang; Qiu, Yang; Cheng, Junye; Luo, Yong

doi:10.1016/j.ceramint.2021.09.059

Cited by 37 publications

(7 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the R FeO 3 family, the magnetocaloric effect is also an important magnetic property. The maximum value of −Δ S m of the ErFeO 3 polycrystal is 7.4 J/kg·K, that of the DyFeO 3 polycrystal is 11.4 J/kg·K, and that of the TmFeO 3 single crystal is 11.93 J/kg·K. For rare-earth-doped compounds, the maximum −Δ S m of Nd 0.5 Dy 0.5 FeO 3 is 10.4 J/kg·K, which is closed to the value of DyFeO 3 .…”

Section: Resultsmentioning

confidence: 84%

Pr-Doping Effect on Spin Switching in Nd_0.8Pr_0.2FeO₃ Single Crystal

Sun,

Song,

Zhu

et al. 2023

J. Phys. Chem. C

View full text Add to dashboard Cite

We have prepared single crystal Nd 0.8 Pr 0.2 FeO 3 by using optical floating zone method and investigated the Pr-doping effect on its magnetic properties in detail. Pr-doping with a ratio of 20% at Nd site in NdFeO 3 lowered the spin reorientation transition (SRT) temperature range of the undoped compounds from 107 to 170 K to 74−110 K, while the SRT type keeps the same; that is, the spin configuration of Fe sublattice changes from Γ 4 (G x , A y , F z ) to Γ 2 (F x , C y , G z ). Unlike the previous research on Nd 0.5 Pr 0.5 FeO 3 , 20% Pr 3+ doping exhibits more excellent properties in spin switching (SSW). There are two events of type-I and one event of type-II SSW observed in Nd 0.8 Pr 0.2 FeO 3 , and more interestingly, the type-I SSW in field cooled cooling (FCC) mode has not yet been observed in the parent single crystal NdFeO 3 . Besides, the type-II SSW can only be found at low temperatures when the magnetic field is below 100 Oe. When the applied field is 70 kOe, an significant magnetic entropy change (−ΔS m ) observed in the sample is 8.07 J/kg•K at 3 K. These results offer a better understanding to the doped magnetic anisotropy in RFeO 3 , and provide new possibilities in the application of magnetic switching materials under low magnetic fields of about tens of Oersted (Oe).

show abstract

Section: Resultsmentioning

confidence: 84%

Pr-Doping Effect on Spin Switching in Nd_0.8Pr_0.2FeO₃ Single Crystal

Sun,

Song,

Zhu

et al. 2023

J. Phys. Chem. C

View full text Add to dashboard Cite

show abstract

“…Additionally, due to the Dzyaloshinskii-Moriya effect, a weak ferromagnetic component along the c direction has emerged, represented as G x A y F z state in Bertaut's notation [13], where the main component of magnetic moment is parallel to the a axis. Following this ordering, a Morin-type spin reorientation transition takes place at T SR ∼ 52 K [14][15][16][17], resulting in the A x G y C z state, which does not has any spontaneous ferromagnetic component. Notice that the easy axis shifts to the b axis instead.…”

Section: Introductionmentioning

confidence: 99%

Role of Dy 4f electrons on magnetic coupling and reorientation in DyFeO₃

Cui,

Jiang,

et al. 2024

J. Phys.: Condens. Matter

View full text Add to dashboard Cite

Spin reorientation transition is an ubiquitous phenomenon observed in magnetic rare earth orthferrites RFeO3, which has garnered significant attention in recent years due to the potential applications in spintronics or magnetoelectric devices. Although a plenty of experimental works suggest that the magnetic interaction between R3+ and Fe3+ spins is at the heart of the spin reorientation, but a direct and decisive support from theoretical side is lacking so far, owning to the tricky handling of R 4f electrons. In this paper, we explored DyFeO3 as an example by means of comprehensive first principles calculations, and compared two different recipes, where the Dy 4f electrons are separately treated as core or valence states, respectively, in order to highlight what the role of Dy 4f electrons plays in, especially the spin reorientation transition. The comparison provides a solid piece of evidence for the experimental argument that the Dy3+-Fe3+ magnetic interactions play a vital role in triggering spin reorientation of Fe moments at low temperature. The findings revealed here not only extend our understanding on the underlying mechanism for spin reorientation transition in RFeO3, but also highlight the importance of explicit description of R 4f electrons in rationally reproducing their structural, electronic and magnetic properties.

show abstract

“…The typical experimental character of the effect is the net magnetic moments M ↓ that is orientated along the opposite direction of a steady magnetic field H ↑ at low temperature 5,6 . This intriguing effect has aroused great interest due to its promising applications in spin switch and magnetic storage as a result of manipulation of the two distinct magnetic states 7–10 . During the formation of negative magnetization, the phenomenon of zero net moments is defined as magnetic compensation effect and its corresponding temperature is described as compensation temperature ( T comp ).…”

Section: Introductionmentioning

confidence: 99%

“…5,6 This intriguing effect has aroused great interest due to its promising applications in spin switch and magnetic storage as a result of manipulation of the two distinct magnetic states. [7][8][9][10] During the formation of negative magnetization, the phenomenon of zero net moments is defined as magnetic compensation effect and its corresponding temperature is described as compensation temperature (T comp ). The observation of negative magnetization indicates that the magnetocrystalline anisotropy is larger enough to prevent the flipping of the spins from aligning with the applied H. Therefore, the effect is well understood in single crystals, but it is still controversial in polycrystalline systems owing to the finite magnetocrystalline anisotropy.…”

Section: Introductionmentioning

confidence: 99%

Temperature‐induced magnetic compensation and negative magnetization in a cluster spin glass Gd₂Co_0.5Mn_1.5O₆ system

Yang

Zheng

et al. 2023

J Am Ceram Soc.

View full text Add to dashboard Cite

Experiments for orthorhombic double perovskite Gd 2 Co 0.5 Mn 1.5 O 6 revealed intrinsic effects of magnetic compensation characterized by M(T comp ) = 0 at T comp = 20 K and negative magnetization depicted by M(T) < 0 under positive magnetic fields, which were experimentally investigated by different protocols of direct current magnetization measurements. Compared to Gd 2 CoMnO 6 , the excessive ratio of Mn in Gd 2 Co 0.5 Mn 1.5 O 6 promotes the antisite disorder and preferably generates magnetic clusters owing to the intrinsic inhomogeneity. The clusters exhibit spin glass (SG) properties as demonstrated by alternating current susceptibility and aging measurements. A possible physical mechanism for evolution of the spin configuration with temperature is proposed. The effects of magnetic compensation and negative magnetization are attributed to the negative exchange coupling among the abundant ferromagnetic clusters. The additional pinning force provided by the cluster SG is an essential factor to prevent the flipping of the spins from aligning with the applied magnetic field.

show abstract

A comparative study on magnetic behaviors and magnetocaloric effect in heavy rare-earth antiferromagnetic orthoferrites RFeO3 (R = Dy, Ho and Er)

Cited by 37 publications

References 24 publications

Pr-Doping Effect on Spin Switching in Nd_0.8Pr_0.2FeO₃ Single Crystal

Pr-Doping Effect on Spin Switching in Nd_0.8Pr_0.2FeO₃ Single Crystal

Role of Dy 4f electrons on magnetic coupling and reorientation in DyFeO₃

Temperature‐induced magnetic compensation and negative magnetization in a cluster spin glass Gd₂Co_0.5Mn_1.5O₆ system

Contact Info

Product

Resources

About

A comparative study on magnetic behaviors and magnetocaloric effect in heavy rare-earth antiferromagnetic orthoferrites RFeO3 (R = Dy, Ho and Er)

Cited by 37 publications

References 24 publications

Pr-Doping Effect on Spin Switching in Nd0.8Pr0.2FeO3 Single Crystal

Pr-Doping Effect on Spin Switching in Nd0.8Pr0.2FeO3 Single Crystal

Role of Dy 4f electrons on magnetic coupling and reorientation in DyFeO3

Temperature‐induced magnetic compensation and negative magnetization in a cluster spin glass Gd2Co0.5Mn1.5O6 system

Contact Info

Product

Resources

About

Pr-Doping Effect on Spin Switching in Nd_0.8Pr_0.2FeO₃ Single Crystal

Pr-Doping Effect on Spin Switching in Nd_0.8Pr_0.2FeO₃ Single Crystal

Role of Dy 4f electrons on magnetic coupling and reorientation in DyFeO₃

Temperature‐induced magnetic compensation and negative magnetization in a cluster spin glass Gd₂Co_0.5Mn_1.5O₆ system