Spin switching in single crystal PrFeO3 and spin configuration diagram of rare earth orthoferrites

Li, Enyu; Feng, Zhenjie; Kang, Baojuan; Zhang, Jincang; Ren, Wei; Cao, Shixun

doi:10.1016/j.jallcom.2019.152043

Cited by 45 publications

(46 citation statements)

References 45 publications

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“…In Fe-based perovskite oxides R FeO 3 33 , 34 , 55 , the anisotropic R –Fe magnetic interactions are generally identified as driving factors behind the SR transitions. In the PbFeO 3 system under investigation, the nonmagnetic nature of the A -site Pb 2+ and Pb 4+ ions negates the possibility of magnetic interactions between A - and B -site cations.…”

Section: Resultsmentioning

confidence: 99%

Observation of novel charge ordering and spin reorientation in perovskite oxide PbFeO3

Zhao

Das

et al. 2021

Nat Commun

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PbMO3 (M = 3d transition metals) family shows systematic variations in charge distribution and intriguing physical properties due to its delicate energy balance between Pb 6s and transition metal 3d orbitals. However, the detailed structure and physical properties of PbFeO3 remain unclear. Herein, we reveal that PbFeO3 crystallizes into an unusual 2ap × 6ap × 2ap orthorhombic perovskite super unit cell with space group Cmcm. The distinctive crystal construction and valence distribution of Pb2+0.5Pb4+0.5FeO3 lead to a long range charge ordering of the -A-B-B- type of the layers with two different oxidation states of Pb (Pb2+ and Pb4+) in them. A weak ferromagnetic transition with canted antiferromagnetic spins along the a-axis is found to occur at 600 K. In addition, decreasing the temperature causes a spin reorientation transition towards a collinear antiferromagnetic structure with spin moments along the b-axis near 418 K. Our theoretical investigations reveal that the peculiar charge ordering of Pb generates two Fe3+ magnetic sublattices with competing anisotropic energies, giving rise to the spin reorientation at such a high critical temperature.

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Section: Resultsmentioning

confidence: 99%

Observation of novel charge ordering and spin reorientation in perovskite oxide PbFeO3

Zhao

Das

et al. 2021

Nat Commun

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“…In Ho 0.5 Dy 0.5 FeO 3 Fe-sublattice orders antiferromagnetically at high temperatures much above 400 K and J Fe−Fe interactions mainly account for the AFM in it [23]. RE-sublattice ordering in HoFeO 3 and DyFeO 3 systems has been reported to be below 10 K [18,20]. Our present study on Ho 0.5 Dy 0.5 FeO 3 was carried out at temperatures higher than 10 K hence, J Fe−Fe are dominant interactions and discussed in details.…”

Section: Magnetic Phases and Spin Re-orientation In Ho05dy 05 Feo3mentioning

confidence: 99%

“…The observed sharp anomalies in SMR were analysed using a simple phenomenological model and attributed to the sudden change in the Néel vector [18]. [19][20][21]. Alternatively, some neutron studies on single crystal HoFeO 3 claimed that there are two SRTs; Γ 4 55K − −− → Γ 1 36K − −− → Γ 2 [22].…”

Section: Introductionmentioning

confidence: 99%

Probing magnetic anisotropy and spin-reorientation transition in 3D antiferromagnet, Ho$_{0.5}$Dy$_{0.5}$FeO$_{3}\vert$Pt using spin Hall magnetoresistance

Wagh¹,

Garg²,

Haldar³

et al. 2022

Preprint

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Orthoferrites (REFeO 3 ) containing rare-earth (RE) elements are 3D antiferromagnets (AFM) that exhibit characteristic weak ferromagnetism originating due to slight canting of the spin moments and display a rich variety of spin reorientation transitions in the magnetic field (H)-temperature (T ) parameter space. We present spin Hall magnetoresistance (SMR) studies on a b-plate (acplane) of crystalline Ho 0.5 Dy 0.5 FeO 3 |Pt hybrid at various T in the range, 11 to 300 K. In the room temperature Γ4(Gx, Ay, Fz) phase, the switching between two degenerate domains, Γ4(+Gx, +Fz) and Γ4(−Gx, −Fz) occurs at fields above a critical value, Hc ≈ 713 Oe. Under H > Hc, the angular dependence of SMR (α-scan) in the Γ4(Gx, Ay, Fz) phase yielded a highly skewed curve with a sharp change (sign-reversal) along with a rotational hysteresis around a-axis. This hysteresis decreases with an increase in H. Notably, at H < Hc, the α-scan measurements on the single domain, Γ4(±Gx, ±Fz) exhibited an anomalous sinusoidal signal of periodicity 360 deg. Low-T SMR curves (H = 2.4 kOe), showed a systematic narrowing of the hysteresis (down to 150 K) and a gradual reduction in the skewness (150 to 52 K), suggesting weakening of the anisotropy possibly due to the T -evolution of Fe-RE exchange coupling. Below 25 K, the SMR modulation showed an abrupt change around the c-axis, marking the presence of Γ2(Fx, Cy, Gz) phase. We have employed a simple Hamiltonian and computed SMR to examine the observed skewed SMR modulation. In summary, SMR is found to be an effective tool to probe magnetic anisotropy as well as a spin reorientation in Ho 0.5 Dy 0.5 FeO 3 . Our spin-transport study highlights the potential of Ho 0.5 Dy 0.5 FeO 3 for future AFM spintronic devices.

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“…The study of the magnetic phase transition of PrFeO 3 single crystal under different magnetic fields shows that the PrFeO 3 sample is very sensitive to the change of the magnetic field [26]. In order to study the influence of the magnetic field on the Γ 4 -Γ 1 transition temperature of the Mn-doped PrFeO 3 , we carried out the magnetization measurements of PrFe 0.75 Mn 0.25 O 3 single crystal under different magnetic fields.…”

Section: -2mentioning

confidence: 99%

“…Here, we choose PrFeO 3 [25,26] as a prototypical orthoferrite to study the SR phase transition by Mn doping. A series of Mn-doped PrFe 1−x Mn x O 3 (where x = 0, 0.1, 0.2, 0.25, 0.3) single crystals have been grown by optical floating zone method.…”

Section: Introductionmentioning

confidence: 99%

Thermal control magnetic switching dominated by spin reorientation transition in Mn-doped PrFeO3 single crystals

et al. 2021

Self Cite

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Spin reorientation transition (SRT) has attracted substantial attention due to its important role in the ultrafast control of spins. However, the transition temperature is usually too low for its practical applications. Here, we demonstrate the ability to modulate the SRT temperature in PrFe 1−x Mn x O 3 single crystals from 196 K to 317 K across the room temperature by varying the Mn concentration. Interestingly, the Γ 4 to Γ 1 spin reorientation of the Mn-doped PrFeO 3 is distinct from the Γ 4 to Γ 2 spin reorientation transition as in the parent material. Because of the coupling between rare-earth ions and transition-metal ions in determining the SRT temperature, the demonstrated control scheme of spin reorientation transition temperature by Mn-doping is expected to be used in temperature control magnetic switching devices and applicable to many other rare-earth orthoferrites.

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Spin switching in single crystal PrFeO3 and spin configuration diagram of rare earth orthoferrites

Cited by 45 publications

References 45 publications

Observation of novel charge ordering and spin reorientation in perovskite oxide PbFeO3

Observation of novel charge ordering and spin reorientation in perovskite oxide PbFeO3

Probing magnetic anisotropy and spin-reorientation transition in 3D antiferromagnet, Ho$_{0.5}$Dy$_{0.5}$FeO$_{3}\vert$Pt using spin Hall magnetoresistance

Thermal control magnetic switching dominated by spin reorientation transition in Mn-doped PrFeO3 single crystals

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