Pressure driven magnetic order in Sr$_{1-x}$Ca$_x$Co$_2$P$_2$

Ola Kenji Forslund; Daniel Andreica; Yasmine Sassa; Masaki Imai; Chishiro Michioka; Kazuyoshi Yoshimura; Zurab Guguchia; Zurab Shermadini; Rustem Khasanov; Jun Sugiyama; Martin Månsson

doi:10.1038/s41598-022-21699-y

paper

Pressure driven magnetic order in Sr $_{1 - x}$ Ca $_{x}$ Co $_{2}$ P $_{2}$

arXiv:2111.11962 · doi:10.1038/s41598-022-21699-y

Abstract

The magnetic phase diagram of Sr $_{1 - x}$ Ca $_{x}$ Co $_{2}$ P $_{2}$ as a function of hydrostatic pressure and temperature is investigated by means of high pressure muon spin rotation, relaxation and resonance ( $μ^{+}$ SR). The weak pressure dependence for the $x \neq = 1$ compounds suggests that the rich phase diagram of Sr $_{1 - x}$ Ca $_{x}$ Co $_{2}$ P $_{2}$ as a function of $x$ at ambient pressure may not only be attributed to solely chemical pressure effects. The $x = 1$ compound on the other hand reveals a high pressure dependence, where the long range magnetic order is fully suppressed at $p_{c2} \approx 9.8$ ~kbar, which seem to be a first order transition. In addition, an intermediate phase consisting of dilute ferromagnetic islands (FMI) is formed above $p_{c1} \approx 8$ ~kbar where they co-exist with a magnetically disordered state. Moreover, such FMI phase seems to consist of an high- (FMI-\textcircled{\small{1}}) and low-temperature (FMI-\textcircled{\small{2}}) region, respectively, separated by a phase boundary at $T_{i} \approx 20$ ~K.

arXiv comment10 pages, 8 figures

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Perspective on the muon-spin rotation/relaxation under hydrostatic pressure

Pressure driven magnetic order in Sr1−x​Cax​Co2​P2​

Abstract

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Pressure driven magnetic order in Sr $_{1 - x}$ Ca $_{x}$ Co $_{2}$ P $_{2}$