Transverse and longitudinal magnetic-field responses in the Ising ferromagnets URhGe, UCoGe, and UGe<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow /><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>

Hardy, F.; Aoki, Dai; Meingast, C.; Schweiß, P.; Philipp, B.; Löhneysen, H. v.; Flouquet, J.

doi:10.1103/physrevb.83.195107

Cited by 64 publications

(99 citation statements)

References 19 publications

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“…This magnetization value is very close to the spontaneous magnetization M c at H = 0, in accordance with a simple picture of the moment reorientation from the easy c axis to the b axis at H R [9,10,14]. Just above H R , there is a small shoulder-like anomaly, which is also seen in dM /dH as a small hump.…”

Section: B Magnetizationsupporting

confidence: 64%

“…URhGe is known to be an itinerant ferromagnet in which a magnetic moment M of ∼ 0.4 µ B /U aligns along the c axis below T C ∼ 9.5 K [13,14]. Magnetic anisotropy is very strong in URhGe, with the c axis being the magnetization easy axis.…”

Section: Introductionmentioning

confidence: 99%

“…Further investigation is thus needed to clarify the FM QPT in URhGe. Up to present, no direct magnetization measurement has been performed in URhGe in the QPT region; field variation of the magnetization in a T = 0 limit has been obtained by a T 2 extrapolation of the M vs. T data measured above 2 K for H b [14]. In the present paper, we have performed low-temperature angle-resolved dc magnetization measurements on URhGe in order to investigate the magnetization behavior near the wing structure of the FM QPT.…”

Section: Introductionmentioning

confidence: 99%

“…The situation is analogous to an Ising ferromagnet in a transverse magnetic field [15], for which a quantum phase transition (QPT) accompanying a reorientation of the magnetic moment into a state with M H can be expected at a finite critical field H R . Previous studies by transport (T ≥ 0.5 K), magnetic torque (T ≥ 0.1 K) and magnetization (T ≥ 2 K) measurements indicate that the transition occurs at µ 0 H R ∼ 12 T in URhGe for H b and becomes first order at low temperature [9,13,14,16]. Because the critical field H R is very close to the field in which the RSC emerges, it has been argued that the magnetic fluctuations associated with the moment reorientation play an essential role of RSC [9,10,13].…”

Section: Introductionmentioning

confidence: 99%

“…Magnetic anisotropy is very strong in URhGe, with the c axis being the magnetization easy axis. Owing to its strong anisotropy, T C of this compound can be tuned to zero by applying a magnetic * Electronic address: sna@issp.u-tokyo.ac.jp field H along the b axis, perpendicular to the spontaneous moment [14]. The situation is analogous to an Ising ferromagnet in a transverse magnetic field [15], for which a quantum phase transition (QPT) accompanying a reorientation of the magnetic moment into a state with M H can be expected at a finite critical field H R .…”

Section: Introductionmentioning

confidence: 99%

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Wing structure in the phase diagram of the Ising ferromagnet URhGe close to its tricritical point investigated by angle-resolved magnetization measurements

et al. 2017

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High-precision angle-resolved dc magnetization and magnetic torque studies were performed on a single-crystalline sample of URhGe, an orthorhombic Ising ferromagnet with the c axis being the magnetization easy axis, in order to investigate the phase diagram around the ferromagnetic (FM) reorientation transition in a magnetic field near the b axis. We have clearly detected first-order transition in both the magnetization and the magnetic torque at low temperatures, and determined detailed profiles of the wing structure of the three-dimensional T -H b -Hc phase diagram, where Hc and H b denotes the field components along the c and the b axes, respectively. The quantum wing critical points are located at µ0Hc ∼ ±1.1 T and µ0H b ∼13.5 T. Two second-order transition lines at the boundaries of the wing planes rapidly tend to approach with each other with increasing temperature up to ∼ 3 K. Just at the zero conjugate field (Hc = 0), however, a signature of the first-order transition can still be seen in the field derivative of the magnetization at ∼ 4 K, indicating that the tricritical point exists in a rather high temperature region above 4 K. This feature of the wing plane structure is consistent with the theoretical expectation that three second-order transition lines merge tangentially at the triciritical point.

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Section: B Magnetizationsupporting

confidence: 64%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Wing structure in the phase diagram of the Ising ferromagnet URhGe close to its tricritical point investigated by angle-resolved magnetization measurements

et al. 2017

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Upper critical field in ferromagnetic metals with triplet pairing

Минеев

2020

Annals of Physics

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The theory of triplet superconductivity in ferromagnetic metals based on electron-electron interaction by spin fluctuation exchange is developed. The equations for the upper critical field temperature dependence are derived. In contrast to the similar equations for the superconductivity in two band metals they contain the pairing amplitudes and the Fermi velocities depending on magnetic field. The critical field behaviour near the critical temperature and at T = 0 is established analytically.

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Heavy fermions in a high magnetic field

Aoki

Knafo

Sheikin

2013

Comptes Rendus. Physique

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We give an overview on experimental studies performed in the last 25 years on heavy-fermion systems in high magnetic field. The properties of field-induced magnetic transitions in heavy-fermion materials close to a quantum antiferromagnetic-to-paramagnetic instability are presented. Effects of a high magnetic field to the Fermi surface, in particular the splitting of spin-up and spin-down bands, are also considered. Finally, we review on recent advances on the study of non-centrosymmetric compounds and ferromagnetic superconductors in a high magnetic field.To cite this article: D. Aoki, W. Knafo, and I. Sheikin, C. R. Physique XX (2012). RésuméFermions lourds en champ magnétique intense. Cette revue donne un aperçu desétudes expérimentales faites depuis 25 ans sur les systèmesà fermions lourds en champ magnétique intense. Les propriétés des transitions de phase magnétiques de composés proches d'une instabilité antiferromagnétique sont présentées. Les effets d'un champ magnétique intense sur la surface de Fermi, en particulier la séparation des bandes de spin "up" et "down", sont aussi considérées. Finalement, nous faisons le point sur les avancées récentes dans l'étude en champ magnétique intense de composés non-centrosymmétriques et de supraconducteurs ferromagnétiques.

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Transverse and longitudinal magnetic-field responses in the Ising ferromagnets URhGe, UCoGe, and UGe2

Cited by 64 publications

References 19 publications

Wing structure in the phase diagram of the Ising ferromagnet URhGe close to its tricritical point investigated by angle-resolved magnetization measurements

Wing structure in the phase diagram of the Ising ferromagnet URhGe close to its tricritical point investigated by angle-resolved magnetization measurements

Upper critical field in ferromagnetic metals with triplet pairing

Heavy fermions in a high magnetic field

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