Evolution of magnetic properties in the solid solution <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si0014.gif" overflow="scroll"><mml:mrow><mml:msub><mml:mrow><mml:mi>UCo</mml:mi></mml:mrow><mml:mrow><mml:mn>1</mml:mn><mml:mo>−</mml:mo><mml:mi>x</mml:mi></mml:mrow></mml:msub><mml:msub><mml:mrow><mml:mi>Pd</mml:mi></mml:mrow><mml:mrow><mml:mi>x</mml:mi></mml:mrow></mml:msub><mml:mi>Ge</mml:mi></mml:mrow></mml:math>

Gralak, D.; Zaleski, A.; Tran, V.H.

doi:10.1016/j.jssc.2016.07.025

Cited by 3 publications

(6 citation statements)

References 41 publications

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“…x Co x Ge where magnetic order survives in the entire concentration range 22 . In contrast to UPd 1x Co x Ge, a deep local minimum in the ordering temperatures is created at the AFM/FM boundary in UIr 1-x Rh x Ge almost at the level of T C of UCoGe.…”

Section: B Qcp In the Uir 1-x Rh X Ge System At X Critmentioning

confidence: 99%

“…This AFM/FM boundary is of interest because the AFM and FM are separated at this point throughout the whole orthorhombic TiNiSi-type UTGe system by the Hill limit 4 . Many studies have been conducted to determine the delicate balance of magnetic interactions in UTGe alloy systems, but they have been primarily on polycrystalline samples where the crucially important magnetocrystalline anisotropy remains hidden 4,[21][22][23][24][25][26] . Our investigation of single crystal study has allowed us to develop a general picture of the magnetism in the AFM part of the UIr 1-x Rh x Ge system which surprisingly preserves many of the magnetic features of the FM parent compounds URhGe and UCoGe.…”

Section: Introductionmentioning

confidence: 99%

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Switching of magnetic ground states across the UIr1−xRhxGe alloy system

et al. 2017

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We investigated the evolution of magnetism in the UIr 1-x Rh x Ge system by the systematic study of high-quality single crystals. Lattice parameters of both parent compounds are very similar resulting in almost identical nearest interatomic uranium distance close to the Hill limit. We established the x-T phase diagram of the UIr 1-x Rh x Ge system and found a discontinuous antiferromagnetic/ferromagnetic boundary at x crit = 0.56 where a local minimum in ordering temperature and maximum of the Sommerfeld coefficient   175 mJ/mol K 2 occurs in the UCoGe-URhGe-UIrGe system, signaling an increase in magnetic fluctuations. However, a quantum critical point is not realized because of the finite ordering temperature at x crit . A magnon gap on the antiferromagnetic side abruptly suppresses magnetic fluctuations. We find a fieldinduced first order transition in the vicinity of the critical magnetic field along the b axis in the entire UIr 1-x Rh x Ge system including the ferromagnetic region UCo 0.6 Rh 0.4 Ge -URhGe. *E-mail address: jiri.pospisil@centrum.cz 2 the b axis becomes the easy magnetization axis, similar to the magnetic behavior of FM URhGe. Here the so-called intermediate b axis is characterized by a magnetic moment re-orientation at a critical magnetic field H R = 12 T which restores the SC state 5, 15 . Recent papers revealed strong tricritical fluctuations in the vicinity of H R 16, 17 accompanied by a Lifshitz-type transition and enhancement of the coefficient  18-20 .We studied the magnetic properties and quantum critical phenomena in the UIr 1-x Rh x Ge system which has an interesting FM/ antiferromagnetic (AFM) boundary at low temperature. This AFM/FM boundary is of interest because the AFM and FM are separated at this point throughout the whole orthorhombic TiNiSi-type UTGe system by the Hill limit 4 . Many studies have been conducted to determine the delicate balance of magnetic interactions in UTGe alloy systems, but they have been primarily on polycrystalline samples where the crucially important magnetocrystalline anisotropy remains hidden 4, 21-26 . Our investigation of single crystal study has allowed us to develop a general picture of the magnetism in the AFM part of the UIr 1-x Rh x Ge system which surprisingly preserves many of the magnetic features of the FM parent compounds URhGe and UCoGe. Our discussion and conclusions are based on a detailed analysis of the crystal structure, magnetization, and heat capacity.

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Section: B Qcp In the Uir 1-x Rh X Ge System At X Critmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Switching of magnetic ground states across the UIr1−xRhxGe alloy system

et al. 2017

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“…6 and 8). One cannot entirely exclude the possibility of specific antiferromagnetic phases in this concentration range of the UCo 1-x Ir x Ge system similar to those proposed in the case of the UCo 1-x Pd x Ge compounds [28]. Rather, however, we tend to assume that the highest substitution disorder (see also [35]) in the intermediate concentration range causes the distribution of exchange interactions that lead to complex magnetic correlations in the paramagnetic state (correlated paramagnet -(CPM)) and ultimately to the freezing of incoherent spin arrangements (spin-glass-like, cluster glass [29] with possible short-range magnetic order (SRMO)).…”

Section: Magnetic Phase Diagrammentioning

confidence: 75%

“…Each sample was characterized by X-ray powder diffraction (XRPD) at room temperature on a Bruker D8 Advance diffractometer. The obtained data were evaluated by the Rietveld technique [28] using FULLPROF/WINPLOTR software [29,30], given the previously published crystallographic data of the isostructural UCoGe [31] and UIrGe [24] compounds as starting models.…”

Section: Methodsmentioning

confidence: 99%

Alloying-driven transition between ferromagnetism and antiferromagnetism in UTGe compounds: UCo1−xIrxGe

et al. 2022

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The evolution of magnetic properties of isostructural and isoelectronic solid solutions of the superconducting itinerant 5f-electron ferromagnet UCoGe with antiferromagnet UIrGe was studied by magnetization and specific heat measurements of a series of UCo 1−x Ir x Ge compounds at various temperatures and magnetic fields. The ferromagnetism in UCoGe was found to have vanished already for the lowest studied Ir substitution for Co (x = 0.005) whereas superconductivity appears to persist up to x = 0.01. The antiferromagnetism of UIrGe is gradually suppressed with decreasing Ir concentration to disappear by x  0.75. The section of the T-x phase diagram in the range 0.005  x < 0.75 is dominated by a paramagnetic phase. With increasing Ir concentration for x > 0.4, antiferromagnetic correlations gradually appear in a paramagnetic state, which may eventually lead to frozen incoherent spin configurations at low temperatures. These results are clearly in stark contrast to the behavior of the related URh 1-x Ir x Ge system, which exhibits a discontinuous transformation between the ferromagnetic and antiferromagnetic phases of parent compounds at a critical Rh-Ir concentration. The striking difference is due to the different degrees of the localization of U 5f-electron states in the weak itinerant ferromagnet UCoGe and the local moment ferromagnet URhGe.

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“…A consecutive UCoGe-URhGe-UIrGe dU-U-T phase diagram, respecting Hill limit scenario [12], will be constructed based on analysis of the magnetization and heat capacity data to uncover the evolution of Tmax, which remained hidden in so far performed polycrystalline studies [13][14][15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Consecutive magnetic phase diagram of UCoGe-URhGe-UIrGe system

Pospíšil

Haga

Miyake

et al. 2018

Physica B: Condensed Matter

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We prepared single crystals in UCo1−xRhxGe and UIr1−xRhxGe systems to establish a complex dU-U-T (dU-U is the shortest interatomic uranium distance and T is temperature) magnetic phase diagram. This recognized a characteristic maximum in magnetic susceptibility at temperature Tmax along the b axis as an important parameter. Three magnetically ordered regions can be distinguished within this scope; first a ferromagnetic region with Curie temperature < Tmax, second a ferromagnetic region with Curie temperature  Tmax and finally an antiferromagnetic region existing on the UIrGe side with Néel temperature < Tmax.

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Evolution of magnetic properties in the solid solution UCo1−xPdxGe

Cited by 3 publications

References 41 publications

Switching of magnetic ground states across the UIr1−xRhxGe alloy system

Switching of magnetic ground states across the UIr1−xRhxGe alloy system

Alloying-driven transition between ferromagnetism and antiferromagnetism in UTGe compounds: UCo1−xIrxGe

Consecutive magnetic phase diagram of UCoGe-URhGe-UIrGe system

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