Ultrasonic studies of superconducting phase diagram of UPt3

S. W. Lin; H. Zhang; C. Jin; J. B. Ketterson; D. M. Lee; D. G. Hinks; M. Levy; Bimal K. Sarma

doi:10.1016/0921-4526(94)91772-8

Ultrasonic studies of superconducting phase diagram of UPt₃

S. W. Lin^*, H. Zhang, C. Jin, J. B. Ketterson, D. M. Lee, D. G. Hinks, M. Levy, Bimal K. Sarma

^*Corresponding author for this work

Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

Abstract

We present a superconducting phase diagram of UPt₃ for a field at 45° to the c-axis constructed from high-resolution ultrasonic velocity measurements. It is unambiguously determined that the H_FL(T) line intersects the H_c2(T) line where a kink is observed. The available data favors the interpretation that the H(T_c*) line terminates on the H_FL(T) line at a different point.

Original language	English (US)
Pages (from-to)	170-172
Number of pages	3
Journal	Physica B: Physics of Condensed Matter
Volume	199-200
Issue number	C
DOIs	https://doi.org/10.1016/0921-4526(94)91772-8
State	Published - Apr 2 1994

Funding

The resultant superconducting phase diagram of UPt3 for the field at 45 ° to the c-axis is shown in Fig. 4. As the HFL(T) and H¢z(T) transitions are distinguishable even within the width of the merging transitions, one traces the HFL(T) transition line to intersect with the Hcz(T) line (at point H in Fig. 4), where a kink on the H,~(7) curve is observed. On the other hand, the Hc,(T) line seems to intersect the HvL(T) line at a point slightly away from the previous critical point. This suggests two tri-critical points instead of a single tetracritieal point in the HT plane for this field orientation. However, the possibility for the existence of a single tetraeritieal point is not ruled out yet, due to the relatively small steps and broad width of the H(Tc,) transitions. Nevertheless, this new phase diagram confirms that for fields along a nonsymmetric axis of the crystal, the phase boundaries line do not repel each other to give two non-intersecting continuous phase boundary lines. In conclusion, the topology of this new phase diagram with the field at 45' to the c-axis resembles to a large extent those with fields along and perpendicular to the c-axis, it is unambiguously determined that the Hvt(T) line intersects the Hcz line where a kink is observed. The available data favors the interpretation that the H(T~,) line terminates on the HFL(T) line at a different point. The research was supported by the Office of Naval Research (UWMI; by NSF under grants DMR-90-11562 and DMR-9121654 (Cornell)and DMR-89-07396 DMR 912052 i (Northwestern).

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

Access to Document

10.1016/0921-4526(94)91772-8

Cite this

@article{cd0017fc7a394d83b3f27df12d17eb6b,

title = "Ultrasonic studies of superconducting phase diagram of UPt3",

abstract = "We present a superconducting phase diagram of UPt3 for a field at 45° to the c-axis constructed from high-resolution ultrasonic velocity measurements. It is unambiguously determined that the HFL(T) line intersects the Hc2(T) line where a kink is observed. The available data favors the interpretation that the H(Tc*) line terminates on the HFL(T) line at a different point.",

author = "Lin, {S. W.} and H. Zhang and C. Jin and Ketterson, {J. B.} and Lee, {D. M.} and Hinks, {D. G.} and M. Levy and Sarma, {Bimal K.}",

note = "Funding Information: The resultant superconducting phase diagram of UPt3 for the field at 45 ° to the c-axis is shown in Fig. 4. As the HFL(T) and H¢z(T) transitions are distinguishable even within the width of the merging transitions, one traces the HFL(T) transition line to intersect with the Hcz(T) line (at point H in Fig. 4), where a kink on the H,~(7) curve is observed. On the other hand, the Hc,(T) line seems to intersect the HvL(T) line at a point slightly away from the previous critical point. This suggests two tri-critical points instead of a single tetracritieal point in the HT plane for this field orientation. However, the possibility for the existence of a single tetraeritieal point is not ruled out yet, due to the relatively small steps and broad width of the H(Tc,) transitions. Nevertheless, this new phase diagram confirms that for fields along a nonsymmetric axis of the crystal, the phase boundaries line do not repel each other to give two non-intersecting continuous phase boundary lines. In conclusion, the topology of this new phase diagram with the field at 45' to the c-axis resembles to a large extent those with fields along and perpendicular to the c-axis, it is unambiguously determined that the Hvt(T) line intersects the Hcz line where a kink is observed. The available data favors the interpretation that the H(T~,) line terminates on the HFL(T) line at a different point. The research was supported by the Office of Naval Research (UWMI; by NSF under grants DMR-90-11562 and DMR-9121654 (Cornell)and DMR-89-07396 DMR 912052 i (Northwestern).",

year = "1994",

month = apr,

day = "2",

doi = "10.1016/0921-4526(94)91772-8",

language = "English (US)",

volume = "199-200",

pages = "170--172",

journal = "Physica B: Physics of Condensed Matter",

issn = "0921-4526",

publisher = "Elsevier B.V.",

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T1 - Ultrasonic studies of superconducting phase diagram of UPt3

AU - Lin, S. W.

AU - Zhang, H.

AU - Jin, C.

AU - Ketterson, J. B.

AU - Lee, D. M.

AU - Hinks, D. G.

AU - Levy, M.

AU - Sarma, Bimal K.

N1 - Funding Information: The resultant superconducting phase diagram of UPt3 for the field at 45 ° to the c-axis is shown in Fig. 4. As the HFL(T) and H¢z(T) transitions are distinguishable even within the width of the merging transitions, one traces the HFL(T) transition line to intersect with the Hcz(T) line (at point H in Fig. 4), where a kink on the H,~(7) curve is observed. On the other hand, the Hc,(T) line seems to intersect the HvL(T) line at a point slightly away from the previous critical point. This suggests two tri-critical points instead of a single tetracritieal point in the HT plane for this field orientation. However, the possibility for the existence of a single tetraeritieal point is not ruled out yet, due to the relatively small steps and broad width of the H(Tc,) transitions. Nevertheless, this new phase diagram confirms that for fields along a nonsymmetric axis of the crystal, the phase boundaries line do not repel each other to give two non-intersecting continuous phase boundary lines. In conclusion, the topology of this new phase diagram with the field at 45' to the c-axis resembles to a large extent those with fields along and perpendicular to the c-axis, it is unambiguously determined that the Hvt(T) line intersects the Hcz line where a kink is observed. The available data favors the interpretation that the H(T~,) line terminates on the HFL(T) line at a different point. The research was supported by the Office of Naval Research (UWMI; by NSF under grants DMR-90-11562 and DMR-9121654 (Cornell)and DMR-89-07396 DMR 912052 i (Northwestern).

PY - 1994/4/2

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N2 - We present a superconducting phase diagram of UPt3 for a field at 45° to the c-axis constructed from high-resolution ultrasonic velocity measurements. It is unambiguously determined that the HFL(T) line intersects the Hc2(T) line where a kink is observed. The available data favors the interpretation that the H(Tc*) line terminates on the HFL(T) line at a different point.

AB - We present a superconducting phase diagram of UPt3 for a field at 45° to the c-axis constructed from high-resolution ultrasonic velocity measurements. It is unambiguously determined that the HFL(T) line intersects the Hc2(T) line where a kink is observed. The available data favors the interpretation that the H(Tc*) line terminates on the HFL(T) line at a different point.

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