Pressure driven magnetic order in Sr&lt;sub&gt;1&lt;/sub&gt;&lt;sub&gt;-&lt;/sub&gt;&lt;em&gt;&lt;sub&gt;x&lt;/sub&gt;&lt;/em&gt; Ca&lt;em&gt;&lt;sub&gt;x&lt;/sub&gt;&lt;/em&gt; Co&lt;sub&gt;2&lt;/sub&gt; P&lt;sub&gt;2&lt;/sub&gt;

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

doi:10.1038/s41598-022-21699-y

Pressure driven magnetic order in Sr₁_-_x Ca_x Co₂ P₂

Forslund OK, Andreica D, Sassa Y, Imai M, Michioka C, Yoshimura K, Guguchia Z, Shermadini Z, Khasanov R, Sugiyama J & Månsson M

Citation

Forslund, O. K., Andreica, D., Sassa, Y., Imai, M., Michioka, C., Yoshimura, K., … Månsson, M. (2022). Pressure driven magnetic order in Sr₁_-_x Ca_x Co₂ P₂. Scientific Reports, 12(1), 17526 (10 pp.). https://doi.org/10.1038/s41598-022-21699-y

Persistent URL https://www.dora.lib4ri.ch/psi/islandora/object/psi:47056

The magnetic phase diagram of Sr_1−xCa_xCo₂P₂ 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≠1 compounds suggests that the rich phase diagram of Sr_1−xCa_xCo₂P₂ as a function of x at ambient pressure may not solely be attributed to 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≈9.8 kbar, which seem to be a first order transition. In addition, an intermediate phase consisting of magnetic domains is formed above p_c1≈8 kbar where they co-exist with a magnetically disordered state. These domains are likely to be ferromagnetic islands (FMI) and consist of an high- (FMI-①) and low-temperature (FMI-②) region, respectively, separated by a phase boundary at T_i≈20 K. This kind of co-existence is unusual and is originating from a coupling between lattice and magnetic degrees of freedoms.