RFe10V2 compounds studied by57Fe,161Dy,166Er and169Tm Mössbauer spectroscopy

Gubbens, P.C.M.; Kraan, A.M. van der; Buschow, K.H.J.

doi:10.1007/bf02049124

Cited by 33 publications

(7 citation statements)

References 5 publications

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“…Further, the quadrupole interaction observed in ErFe 10 V 2 and TmFe 10 V 2 is almost equal to the free ion value, as can be expected for an easy magnetization direction parallel to the c axis as found by Gubbens et al (1988b). Moreover, the quadrupole interaction of GdFe 10 V 2 , which can exclusively ascribe to the lattice contribution, is small, as shown in Table 4.22.…”

Section: Rare Earth Mössbauer Spectroscopy Measurements On Lanthanidesupporting

confidence: 63%

Rare Earth Mössbauer Spectroscopy Measurements on Lanthanide Intermetallics

Gubbens

2012

Handbook of Magnetic Materials

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Section: Rare Earth Mössbauer Spectroscopy Measurements On Lanthanidesupporting

confidence: 63%

Rare Earth Mössbauer Spectroscopy Measurements on Lanthanide Intermetallics

Gubbens

2012

Handbook of Magnetic Materials

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“…These spectral simulations involve the diagonalization of the nuclear 161 Dy Hamiltonian including hyperfine interactions as well as the calculation of the coherently scattered radiation. Theanalysis reveals an internal magnetic hyperfine field of B 0 = 582.3(5) Tw ith s(B 0 ) = 1.9(4) Te xceeding the reported values of 559.8 T [20,35] or 565 T [36] for the free-ion Dy III with a J = 15/2, m J =AE 15/2 ground state.Small hyperfine field distributions have also been reported for Dy/Fem ultilayers and tetragonal Dy 1+e Fe 4 B 4 alloys in the magnetically ordered state. Theanalysis reveals an internal magnetic hyperfine field of B 0 = 582.3(5) Tw ith s(B 0 ) = 1.9(4) Te xceeding the reported values of 559.8 T [20,35] or 565 T [36] for the free-ion Dy III with a J = 15/2, m J =AE 15/2 ground state.Small hyperfine field distributions have also been reported for Dy/Fem ultilayers and tetragonal Dy 1+e Fe 4 B 4 alloys in the magnetically ordered state.…”

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confidence: 49%

¹⁶¹Dy Time‐Domain Synchrotron Mössbauer Spectroscopy for Investigating Single‐Molecule Magnets Incorporating Dy Ions

et al. 2019

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Time-domain synchrotron Mçssbauer spectroscopy (SMS) based on the Mçssbauer effect of 161 Dy has been used to investigate the magnetic properties of aD y III -based singlemolecule magnet (SMM). The magnetic hyperfine field of [Dy(Cy 3 PO) 2 (H 2 O) 5 ]Br 3 ·2 (Cy 3 PO)·2 H 2 O·2 EtOH is with B 0 = 582.3(5) Ts ignificantly larger than that of the free-ion Dy III with a 6 H 15/2 ground state.This difference is attributed to the influence of the coordinating ligands on the Fermi contact interaction between the sand 4f electrons of the Dy III ion. This study demonstrates that 161 Dy SMS is an effective local probe of the influence of the coordinating ligands on the magnetic structure of Dy-containing compounds.The development of single-molecule magnets (SMMs), which show slow relaxation of their magnetization as aresult of abarrier height for spin inversion, [1][2][3][4] has attracted increasing interest in recent years due to the quantum nature with potential applications envisaged in spintronics and quantum computing. [5] Because of their large magnetic moments and their strong magnetic anisotropy,l anthanide ions in suitable ligand fields are ideal candidates for SMMs. [1,2,6] Among the lanthanide ions,D yi ons in addition to Tb ions [7] are often chosen since they can lead to SMMs with record anisotropy barriers [8] and blocking temperatures up to 80 Ka sw ell as showing molecular magnetic hysteresis. [9,10] Magnetic properties of molecular spin systems like SMMs are typically studied by alternating (ac) and direct current magnetic measurement methods,electron spin resonance,and nuclear magnetic resonance. [11] Fori ron-containing SMMs 57 Fe Mçssbauer spectroscopy has also been used in order to determine local moments and spin-relaxation dynamics. [12][13][14] Thei ntense interest and ongoing development of Dy-based SMMs demands gaining at horough understanding of their magnetic properties and thus requires am ultitechnique approach. [12,15,16] Herein, we report on establishing 161 Dy time-domain synchrotron Mçssbauer spectroscopy (SMS) as anovel spectroscopic tool to study magnetic properties in Dy-containing molecules and in particular in SMMs.T his technique,a lso called nuclear forward scattering (NFS), makes use of the 161 Dy nucleus as aprobe sensing the Dy magnetization via the hyperfine interactions,w hich are effective between the Dy electron shell and the 161 Dy nucleus. [17] Conventional 161 Dy Mçssbauer spectroscopy has already been used to study magnetic hyperfine fields of Dy metal, [18] oxide [19,20] and alloys, [21,22] but it has not yet been used to investigate Dycontaining SMMs,i np art because,a lthough the naturally abundant (18.9 %) 161 Dy isotope is stable, [23] the necessary 161 Tb: 161 GdF 3 source has to be activated by neutron irradiation and 161 Tb has ah alf-life of only 6.9 days. [20] With the development of modern synchrotron sources and corresponding high-resolution monochromator systems,i th as been possible to realize 161 Dy SMS. [23][24][25][26] Thef irst excited nuclear state...

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“…Since for all the compounds under study we have found for the 4f-contribution of the hyperfine fields the free ion value, we expect for the electric quadrupole splitting the same. The measured values of 1 / 2 e 2 q~ at T been attributed to the lattice contribution of which we can determine the crystal field term B: as shown earlier [6]. The lattice contribution of the electric quadrupole splitting is Q S ' "~~= -~/~~V ; :~~Q with Q is the quadrupole moment of the nucleus.…”

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confidence: 62%

“…The procedure followed is the same as for the R2Fel4C compounds. Some of the results have been published earlier [l,4,6, 71. In case of DyCo, and Dy2C017, S M has been taken constant below 300 K.…”

mentioning

confidence: 99%