Properties of Er 3Rh single crystals (original) (raw)
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Magnetic, thermal and electrical properties of Er3Co studied on single crystals
Physica B: Condensed Matter, 2002
The Er 3 Co compound with orthorhombic crystal structure has been investigated by means of magnetic susceptibility, magnetization, electrical resistivity and heat capacity measurements which were made for the first time on single crystalline samples. Below 13.8 K this compound exhibits a complex noncollinear ferromagnetic structure which results from the low symmetry crystalline electric field that surpasses the exchange interaction. Using the magnetization and magnetoresistance measurements along the main crystallographic directions, a complicated and anisotropic magnetization process was revealed. The variation of the electrical resistivity of Er 3 Co with the temperature is discussed assuming an influence of spin fluctuations rising from f2d exchange interactions.
A neutron diffraction study on an Er7Rh3 single crystal
Physica B: Condensed Matter, 2006
Magnetic and neutron diffraction studies have been performed on an Er 7 Rh 3 single crystal. The magnetic measurements show that there are two successive antiferromagnetic transitions at T N ¼ 13.0 K and T t1 ¼ 6.2 K. A small magnetic anisotropy is observed in the paramagnetic susceptibility. Neutron diffraction also shows evidence of a commensurate to incommensurate magnetic transition at T t2 ¼ 4.5 K. The magnetic structure in the low temperature antiferromagnetic phase below T t2 is characterized by the two magnetic propagation vectors k 1 ¼ (0 0 1/2) and k 2 ¼ (0 0 1). With increasing temperature, the magnetic modulation characterized by k 2 disappears at T t1 but the z-component is temperature independent. On the other hand, the magnetic modulation characterized by k 1 becomes incommensurate at T t2 where k 1 ¼ (0 0 0.42) and persists in the high temperature phase between T t1 and T N . Fig. 3. Peak intensity of the magnetic reflections of (2 0 0) + and (2 0 0) m and k 1z as a function of temperature. Solid lines are guide for the eyes.
Coupling between the axial and basal plane magnetization of Er and ErHx monocrystals
Journal of Magnetism and Magnetic Materials, 1987
We present detailed magnetization measurements of Er and ErH x monocrystals in the vicinity of the Nrel temperatures T N (along the c axis) and TH (in the basal plane) as well as near Tc, the ferromagnetic ordering temperature along c. In all cases, we observe that the occurrence of magnetic ordering along a given direction modifies the magnetization along the other one. We show that this mutual influence is the result of entropy and energy couplings, between the c axis and the basal plane magnetizations.
Synthesis and magnetic behaviour of Er3AlCx
DAE SOLID STATE PHYSICS SYMPOSIUM 2018
High quality polycrystallineEr 3 AlC x (x = 0.8 and 1) system is synthesized using conventional tri arc melting. X-ray diffraction of Er 3 AlC is analyzed using Rietveld method which reveals single phase formation with Pm-3m cubic perovskite structure. Susceptibility curve indicates antiferromagnetic ordering at Neel temperatureT N = 3.1 K.The values of p and μ eff deduced from inverse susceptibility curve are consistent with magnetic ordering temperature and theoretical value for Er 3+ ion, respectively. Metamagnetic transition is found at 10 kOe.
Magnetic and thermal properties of Er_{75}Dy_{25} single crystals
Physical Review B, 2011
We report on an experimental study of the thermal and magnetic properties of Er 75 Dy 25 single crystals with magnetic fields applied parallel to the [0001] and [101̅ 0] directions. The [0001] direction is the easy axis of magnetization, while the [101̅ 0] direction is the hard axis of magnetization. Three major transitions are observed in the heat capacity, magnetization, and alternating current magnetic susceptibility data. A firstorder transition is observed at ∼30 K, and two second-order transitions occur at ∼45 and ∼110 K. The H-T phase diagrams constructed from the experimental data reveal that several magnetic phases, including ferromagnetic cone, ferromagnetic fan, and c axis-modulated phases, exist in an Er 75 Dy 25 single crystal. Both similarities and dissimilarities are observed in the H-T phase diagrams of Er 75 Dy 25 when compared to the H-T phase diagrams of pure Er single crystals.
Journal of Applied Physics, 2009
Magnetic and magnetocaloric properties of single crystal Er 2 ͑Co 0.4 Fe 0.6 ͒ 17 were investigated. First order spin reorientation phase transition was observed at 272 K. Magnetic easy-axis anisotropy was found below this temperature and the easy-plane one above. Magnetocaloric effect accompanying field induced first order magnetic reorientation has been measured directly. It reaches Ϫ0.25 and 0.15 K, respectively, provided that the field is perpendicular to the easy-magnetization direction. These values were satisfactorily compared with thermodynamic calculations.
Magnetic properties of Er x Y 1− x F 3 solid solutions
Journal of Molecular Biology, 2005
The Er x Y 1Kx F 3 (xZ0.1, 0.2, 0.7, 0.9, 1) solid solutions were synthesized and characterized by X-ray powder diffraction and magnetic measurements. The crystal structure refinements done by the Rietveld profile method show that no significant change of the structure parameters with the erbium concentration occurs. On the basis of DC susceptibility measurements in the 2-300 K range the lowest four crystal field levels have been determined, giving the ground level magnetic moment value of 6.7 m B . Results of M(H) studies point to the presence of complex exchange interactions between erbium ions. q
Journal of Alloys and Compounds, 2002
The effect of hydrogenation on the magnetic properties of the intermetallic compound ErFe Ti are studied. Single crystals of the 11 hydrogen-containing compound were obtained. Magnetic characteristics of the ErFe Ti and ErFe TiH single crystals have been 11 11 investigated in the temperature range 4.2-750 K and in magnetic fields up to 13 kOe. Upon hydrogenation, the uniaxial magnetic anisotropy is observed to increase, while the spin-reorientation temperatures T shifted towards lower temperatures.
Magnetic properties and crystal field splitting of the rare-earth pyrochlore Er2Ir2O7
Physical Review B
The effects on the rare-earth crystal-field-splitting schemes of incorporation of large spin-orbit coupling (5d) ions, such as Ir 4+ , into the rare-earth pyrochlores are largely unknown. We report on the preparation, specific heat, magnetization, and inelastic neutron-scattering study of Er 2 Ir 2 O 7 pyrochlore. An anomaly in specific heat and bifurcation of zero-field cooled and field cooled magnetization indicates an ordering of the Ir sublattice below 140 K, in good agreement with other rare-earth pyrochlore iridates. The Er sublattice ordering below 2 K can be considered short range as well, following the development of specific-heat and magnetization data down to low temperatures. The inelastic neutron scattering allowed us to unambiguously determine the crystal-field (CF) eigenenergies and parameters of Er 2 Ir 2 O 7 , which are dictated dominantly by nearest-neighbor anions (the oxygen cage around the Er cation). The influence of the magnetic iridium cations on the erbium CF scheme is rather moderate despite the strong spin-orbit coupling expected in a 5d metal, which is evident when comparing the energy spectra of this iridate and other 3d-or 4d-metal containing erbium pyrochlores. The determined CF parameters were subsequently utilized for calculations of magnetization and specific-heat CF contributions, leading to an excellent agreement with experimental data.