Magnetic phases of erbium orthochromite

Tiwari, Brajesh; Surendra, M. Krishna; Rao, M. S. Ramachandra

doi:10.1088/2053-1591/1/3/036102

Cited by 10 publications

(7 citation statements)

References 20 publications

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“…These values are in good agreement with our present Ce doped YCrO 3 system in which R 3+ -Cr 3+ interactions evolved. While the Curie-Weiss temperatures, θ CW lies between −386 K (x = 0) and −664 K (x = 0.2), in-line with the previous reports on pristine compound YCrO 3 as well as Pr substituted YCrO 3 wherein a wide range of θ CW (−325 K to −461 K and −596 K) estimated from the standard magnetization data and by means of NMR Knight shift experiments [9,30,32,[39][40][41][42][43].…”

Section: Results and Analysissupporting

confidence: 90%

“…Such situation is quite opposite to the case of Ce substituted system where single-ion anisotropy is disturbed by the intermediate plane of Ce in which H K 4 gradually come into account by weakening the H K 2 , thereby pushing the onset of disordering temperature well ahead in case of FCC than FCW protocol. This interpretation is also consistent with the negative slopes of Arrot plots (M 2 vs H/M) obtained from the M-H isotherms measured below the ordering temperature [50][51][52].…”

Section: Discussionsupporting

confidence: 89%

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Magnetization reversal, field-induced transitions and H–T phase diagram of Y_1−xCe_xCrO₃

Dokala¹,

Das²,

Weise³

et al. 2021

J. Phys.: Condens. Matter

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We report a systematic study of the magnetic phase diagram in the H–T plane, negative magnetization (NM), exchange interactions and field-induced spin–flop transitions in the distorted perovskite Y1−x Ce x CrO3. Locked AFM and weak-FM configurations in Γ4(G z , F y , A x ) phase of YCrO3 (S = 3/2 ground state) unlocks into the Γ2 (F z , G y , C x ; F z R , C x R ) phase of the canted AFM and FM structures with the dilute substitution of Ce (x ⩾ 0.05). The asymmetric and symmetric exchange interaction (J AS ∼ 0.11 meV and J S ∼ 0.85 meV) between the trivalent Ce and Cr enable the positive quartic-anisotropy field ( H K 4 ∼ 2.85 × 102 Oe) along with the second order anisotropy field ( H K 2 ∼ 5.93 × 102 Oe). Unlike the pristine YCrO3 compound, the Ce incorporated system exhibits a giant fourth-order anisotropy constant (K 4 = 1.35 × 105 erg/c.c.) due to the asymmetric exchange interaction between the trivalent Ce–Cr which further lifts the free energy of the system and causes lag in the onset of AFM ordering showing the significant thermal hysteresis (ΔT ∼ 10 K) in the field-cooled (FC)-warming measurement protocol as compared to the FC-cooling mode. The H–T phase diagram, mapped from the isothermal magnetization data and differential magnetic susceptibility data with different measurement protocols clearly distinguishes three prominent regions below the T N (∼150 K), viz (i) long-range canted AFM + weak FM phase (Γ4 (G z , F y , A x )), (ii) Γ24 mixed phase and (iii) robust Γ2 (F z , G y , C x ; F z R , C x R ) AFM + FM phases. Tunable spin–flopped transition (∼ 30 kOe), significant negative exchange-bias field (H EB ∼ 2.5 kOe), huge coercive field (H C ∼ 22 kOe) and large NM (ΔM ∼ 280 emu/mole) are the unique characteristic features of the current investigated system.

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Section: Results and Analysissupporting

confidence: 90%

Section: Discussionsupporting

confidence: 89%

Magnetization reversal, field-induced transitions and H–T phase diagram of Y_1−xCe_xCrO₃

Dokala¹,

Das²,

Weise³

et al. 2021

J. Phys.: Condens. Matter

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“…RFeO 3 compounds, particularly those which contain two types of magnetic ions, exhibit complex magnetic behaviour as a function of temperature, pressure, particle size, and magnetic field. 6,7 The exchange interaction between the transition metal ions is typically strong and antiferromagnetic in nature; as a result, the magnetic ordering in the transition metal sublattice typically takes place at higher temperatures than in the rare earth sublattice. Their magnetic behaviour is also less anisotropic compared to that of the rare earth sublattice, due to the quenching of the orbital angular momentum.…”

Section: Introductionmentioning

confidence: 99%

Nanosize effect: Enhanced compensation temperature and existence of magnetodielectric coupling in SmFeO3

et al. 2017

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In transition metal oxides, quantum confinement arising from a large surface to volume ratio often gives rise to novel physico-chemical properties at nanoscale. Their size dependent properties have potential applications in diverse areas, including therapeutics, imaging, electronic devices, communication systems, sensors, and catalysis. We have analyzed structural, magnetic, dielectric, and thermal properties of weakly ferromagnetic SmFeO 3 nanoparticles of sizes about 55 nm and 500 nm.The nano-size particles exhibit several distinct features that are neither observed in their larger-size variants nor reported previously for the single crystals. In particular, for the 55 nm particle, we observe six-fold enhancement of compensation temperature, an unusual rise in susceptibility in the temperature range 550 to 630 K due to spin pinning, and coupled antiferromagnetic-ferroelectric transition, directly observed in the dielectric constant. I.

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“…Below T comp , the magnetization is negative while with further warming, it changes back to positive values. Above T comp , the magnetization increases to attain a maximum at T b ∼220 K and then decreases gradually to reach the transition temperature T N ∼260 K. The T 1 anomaly may be ascribed to the magnetic ordering of cerium ions which similarly has been seen as the spin reorientation in different members of RCrO 3 compounds 15,34,35 . Interestingly, Ce ordering appears to have no immediate impact on the Cr magnetic structure as the intensity of the (110)/(011) magnetic Bragg reflection follows an standard order parameter temperature dependence (see discussion and Figure 13 below).…”

Section: B Magnetic Propertiesmentioning

confidence: 92%

Impact of Rare-earth site Substitution on the Structural, Magnetic and Thermal Properties of Ce$_{1-x}$Eu$_x$CrO$_3$ Orthochromite Solid-solutions

Taheri¹,

Razavi²,

Yamani³

et al. 2018

Preprint

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The role of slight changes of the chemical composition on antiferromagnetic ordering of Cr in rareearth orthochoromites was investigated on a series of ceramic solid-solutions Ce1−xEuxO3 where x varied from 0 to 1. Gradual replacement of Ce with Eu reduces the cell volume and acts equivalently to applying external pressure. Full replacement of Ce by Eu, on the other hand, reduces the Néel temperature from 260 K for CeCrO3 to 178 K for EuCrO3 as established by magnetization, heat capacity and neutron powder diffraction measurements. High resolution x-ray powder diffraction measurements on Ce1−xEuxO3 and neutron powder diffraction studies on CeCrO3 enable to correlate the magnetic properties of the Cr magnetic subsystem with the size of the lattice and minute changes of the bonding and torsion angles within and between the CrO6 octahedra. We find that the sizes and the shapes of the CrO6 octahedra remain essentially unchanged as the size of the rare-earth cations is reduced whereas decreasing Cr -O -Cr bonding angles and increasing inclination of neighboring octahedra enable to compensate for the decreasing lattice size.

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Magnetic phases of erbium orthochromite

Cited by 10 publications

References 20 publications

Magnetization reversal, field-induced transitions and H–T phase diagram of Y_1−xCe_xCrO₃

Magnetization reversal, field-induced transitions and H–T phase diagram of Y_1−xCe_xCrO₃

Nanosize effect: Enhanced compensation temperature and existence of magnetodielectric coupling in SmFeO3

Impact of Rare-earth site Substitution on the Structural, Magnetic and Thermal Properties of Ce$_{1-x}$Eu$_x$CrO$_3$ Orthochromite Solid-solutions

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Magnetic phases of erbium orthochromite

Cited by 10 publications

References 20 publications

Magnetization reversal, field-induced transitions and H–T phase diagram of Y1−x Ce x CrO3

Magnetization reversal, field-induced transitions and H–T phase diagram of Y1−x Ce x CrO3

Nanosize effect: Enhanced compensation temperature and existence of magnetodielectric coupling in SmFeO3

Impact of Rare-earth site Substitution on the Structural, Magnetic and Thermal Properties of Ce$_{1-x}$Eu$_x$CrO$_3$ Orthochromite Solid-solutions

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Magnetization reversal, field-induced transitions and H–T phase diagram of Y_1−xCe_xCrO₃

Magnetization reversal, field-induced transitions and H–T phase diagram of Y_1−xCe_xCrO₃