Phase diagram of the dilute magnet LiHo_xY_{1-x}F_4

Details Phase diagram of the dilute magnet LiHo_xY_{1-x}F_4 Phase diagram of the dilute magnet LiHo_xY_{1-x}F_4

2007-04-27

arxiv.org/abs/0704.3656v2

Phys. Rev. B 76, 054423 (2007)

Physics

Condensed Matter

Statistical Mechanics

5 pages, 4 figures

Scientific paper

10.1103/PhysRevB.76.054423

We study the effective long-range Ising dipole model with a local exchange interaction appropriate for the dilute magnetic compound LiHo_{x}Y_{1-x}F_4. Our calculations yield a value of 0.12 K for the nearest neighbor exchange interaction. Using a Monte Carlo method we calculate the phase boundary T_c(x) between the ferromagnetic and paramagnetic phases. We demonstrate that the experimentally observed linear decrease in T_c with dilution is not the simple mean-field result, but a combination of the effects of fluctuations, the exchange interaction and the hyperfine coupling. Furthermore, we find a critical dilution x_c=0.21(2), below which there is no ordering. In agreement with recent Monte Carlo simulations on a similar model, we find no evidence of the experimentally observed freezing of the glassy state in our calculation. We apply the theory of Stephen and Aharony to LiHo_{x}Y_{1-x}F_4 and find that the theory does predict a finite-temperature freezing of the spin glass. Reasons for the discrepancies are discussed.

Affiliated with

Also associated with

No associations

Rating

Phase diagram of the dilute magnet LiHo_xY_{1-x}F_4 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Phase diagram of the dilute magnet LiHo_xY_{1-x}F_4, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Phase diagram of the dilute magnet LiHo_xY_{1-x}F_4 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-676849