Temperature dependence of the upper critical field in bcc solid 3He

Todd E. Sherline; E. Dwight Adams; Yasu Takano

doi:10.1007/s10909-007-9444-4

Temperature dependence of the upper critical field in bcc solid ³He

Todd E. Sherline, E. Dwight Adams, Yasu Takano

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

Abstract

The temperature dependence of the upper critical field for the antiferromagnetic high-field phase of bcc solid ³He has been calculated by Iwahashi and Masuda utilizing the Green-function method with Tyablikov decoupling. In the low temperature limit the upper critical field, H _c2(T), is found to decrease from H _c2(0) with increasing temperature as a power law with exponent 3/2. Interestingly, the same power law dependence has been predicted for a system of dilute magnons undergoing Bose-Einstein condensation and has been observed in the spin-gap antiferromagnets TlCuCl ₃, BaCuSi ₂O ₆, and NiCl ₂ -4SC(NH ₂) ₂. An experiment has been attempted to determine precisely the temperature dependence of the upper critical field in bcc solid ³He by measuring the pressure of the solid during adiabatic demagnetization through the critical field. The theoretical framework motivating the experimental study is presented along with details of the experimental setup.

Original language	English
Pages (from-to)	743-747
Number of pages	5
Journal	Journal of Low Temperature Physics
Volume	148
Issue number	5-6
DOIs	https://doi.org/10.1007/s10909-007-9444-4
State	Published - Sep 2007
Externally published	Yes

Funding

Acknowledgements We thank K. Iwahashi and A.M. Tsvelik for useful communications. This research was supported by the National High Magnetic Field Laboratory In-House Research Program.

Keywords

03.75.Nt
67.80.Jd
75.30.Kz

Access to Document

10.1007/s10909-007-9444-4

Cite this

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title = "Temperature dependence of the upper critical field in bcc solid 3He",

abstract = "The temperature dependence of the upper critical field for the antiferromagnetic high-field phase of bcc solid 3He has been calculated by Iwahashi and Masuda utilizing the Green-function method with Tyablikov decoupling. In the low temperature limit the upper critical field, H c2(T), is found to decrease from H c2(0) with increasing temperature as a power law with exponent 3/2. Interestingly, the same power law dependence has been predicted for a system of dilute magnons undergoing Bose-Einstein condensation and has been observed in the spin-gap antiferromagnets TlCuCl 3, BaCuSi 2O 6, and NiCl 2 -4SC(NH 2) 2. An experiment has been attempted to determine precisely the temperature dependence of the upper critical field in bcc solid 3He by measuring the pressure of the solid during adiabatic demagnetization through the critical field. The theoretical framework motivating the experimental study is presented along with details of the experimental setup.",

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T1 - Temperature dependence of the upper critical field in bcc solid 3He

AU - Sherline, Todd E.

AU - Adams, E. Dwight

AU - Takano, Yasu

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N2 - The temperature dependence of the upper critical field for the antiferromagnetic high-field phase of bcc solid 3He has been calculated by Iwahashi and Masuda utilizing the Green-function method with Tyablikov decoupling. In the low temperature limit the upper critical field, H c2(T), is found to decrease from H c2(0) with increasing temperature as a power law with exponent 3/2. Interestingly, the same power law dependence has been predicted for a system of dilute magnons undergoing Bose-Einstein condensation and has been observed in the spin-gap antiferromagnets TlCuCl 3, BaCuSi 2O 6, and NiCl 2 -4SC(NH 2) 2. An experiment has been attempted to determine precisely the temperature dependence of the upper critical field in bcc solid 3He by measuring the pressure of the solid during adiabatic demagnetization through the critical field. The theoretical framework motivating the experimental study is presented along with details of the experimental setup.

AB - The temperature dependence of the upper critical field for the antiferromagnetic high-field phase of bcc solid 3He has been calculated by Iwahashi and Masuda utilizing the Green-function method with Tyablikov decoupling. In the low temperature limit the upper critical field, H c2(T), is found to decrease from H c2(0) with increasing temperature as a power law with exponent 3/2. Interestingly, the same power law dependence has been predicted for a system of dilute magnons undergoing Bose-Einstein condensation and has been observed in the spin-gap antiferromagnets TlCuCl 3, BaCuSi 2O 6, and NiCl 2 -4SC(NH 2) 2. An experiment has been attempted to determine precisely the temperature dependence of the upper critical field in bcc solid 3He by measuring the pressure of the solid during adiabatic demagnetization through the critical field. The theoretical framework motivating the experimental study is presented along with details of the experimental setup.

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