Neutron Diffraction Study of the Magnetic Properties of Rare-Earth-Iron Perovskites

Koehler, W. C.; Wollan, E. O.; Wilkinson, M. K.

doi:10.1103/physrev.118.58

Cited by 268 publications

(111 citation statements)

References 18 publications

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“…18,19 It was found that the Fe sub-lattices order anti-ferromagnetically in the G-type configuration 20 with a Néel temperature of 647 K. It was reported that at room temperature the Fe moments are approximately parallel to [100] and at 43 K lie in a (110) plane. Below a Néel temperature of 6.5 K the Ho sub-lattices order with their moments in the ab plane at 27 • to y leading to a ferromagnetic component of moment parallel to x.…”

Section: Introductionmentioning

confidence: 99%

Temperature evolution of magnetic structure of HoFeO3 by single crystal neutron diffraction

2017

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We have investigated the temperature evolution of the magnetic structures of HoFeO 3 by single crystal neutron diffraction. The three different magnetic structures werevfound as a function of temperature for HoFeO 3 . In all three phases the fundamental coupling between the Fe sub-lattices remains the same and only their orientation and the degree of canting away from the ideal axial direction varies. The magnetic polarisation of the Ho sub-lattices in these two higher temperature regions, in which the major components of the Fe moment lie along x and y, is very small. The canting of the moments from the axial directions is attributed to the antisymmetric interactions allowed by the crystal symmetry. In the low temperature phase two further structural transitions are apparent in which the spontaneous magnetisation changes sign with respect to the underlying antiferromagnetic configuration. In this temperature range the antisymmetric exchange energy varies rapidly as the the Ho sub-lattices begin to order. So long as the ordered Ho moments are small the antisymmetric exchange is due only to Fe-Fe interactions, but as the degree of Ho order increases the Fe-Ho interactions take over whilst at the lowest temperatures, when the Ho moments approach saturation the Ho-Ho interactions dominate. The reversals of the spontaneous magnetisation found in this study suggest that in HoFeO 3 the sums of the Fe-Fe and Ho-Ho antisymmetric interactions have the same sign as one another, but that of the Ho-Fe terms is opposite. © 2017 Author (s)

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Section: Introductionmentioning

confidence: 99%

Temperature evolution of magnetic structure of HoFeO3 by single crystal neutron diffraction

2017

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“…This transition might be continuous/abrupt depending upon the of RE element [9]. NdFeO 3 is one of the well studied family members of orthoferrite materials which exhibits antiferromagnetic ordering and temperature dependent SR [10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25]. It crystallizes in orthorhombic crystal structure of the space group P bnm and comprises of highly distorted corner shared Mn(Fe)O 6 octahedra.…”

Section: Introductionmentioning

confidence: 99%

Spin reorientation inNdFe0.5Mn0.5O3: Neutron scattering andab initiostudy

et al. 2017

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The structural, magnetic, and electronic properties of NdFe0.5Mn0.5O3 have been studied in detail using bulk magnetization, neutron/x-ray diffraction and first principles density functional theory calculations. The material crystallizes in the orthorhombic P bnm structure, where both Mn and Fe occupy the same crystallographic site (4b). Mn/Fe sublattice of the compound orders in to a G-type antiferromagnetic phase close to 250 K where the magnetic structure belongs to Γ1 irreducible representation with spins aligned along the crystallographic b direction. This is unconventional in the sense that most of the orthoferrites and orthochromites order in the Γ4 representation below the Néel temperature.This magnetic structure then undergoes a complete spin reorientation transition with temperature in the range 75 K > ∼ T > ∼ 25 K where the magnetic structure exists as a sum of two irreducible representations (Γ1+Γ2) as seen from neutron diffraction measurements. At 6 K, the magnetic structure belongs entirely to Γ2 representation with spins aligned antiferromagnetically along the crystallographic c direction having a small ferromagnetic component (Fx). The unusual spin reorientation and correlation between magnetic ground state and electronic structure have been investigated using first principles calculations within GGA+U and GGA+U+SO formalisms.

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“…In comparison to LaFeO 3 , LaCrO 3 has a much lower T N (∼300 K). [156,176] Consequently, a decrease of T N , as a result of electron doping, can easily be investigated by VSM measurements. Furthermore, ferromagnetic behavior has been observed in chemically doped LaCrO 3 , which is not the case for chemically doped LaFeO 3 .…”

Section: Discussionmentioning

confidence: 99%

“…The paramagnetic to antiferromagnetic transition of bulk LaFeO 3 is at 740 K, which is outside the range of the used PPMS. [156] The lack of clear changes in magnetic behavior may be explained by several scenarios. First of all, the LaFeO 3 films were very thin, ≤8 unit cells.…”

Section: Magnetic Propertiesmentioning

confidence: 99%

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Reconstructions at complex oxide interfaces

Kleibeuker

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Neutron Diffraction Study of the Magnetic Properties of Rare-Earth-Iron Perovskites

Cited by 268 publications

References 18 publications

Temperature evolution of magnetic structure of HoFeO3 by single crystal neutron diffraction

Temperature evolution of magnetic structure of HoFeO3 by single crystal neutron diffraction

Spin reorientation inNdFe0.5Mn0.5O3: Neutron scattering andab initiostudy

Reconstructions at complex oxide interfaces

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