Transition De Phase Metamagnetique Du Bromure Ferreux

Crystal and Magnetic Structures in Layered, Transition Metal Dihalides and Trihalides

“…In the antiferromagnetic state, magnetic field induced phase transitions, or metamagnetic transitions, occur in FeCl 2 , FeBr 2 , and FeI 2 at applied fields near 11, 29, and 46 kOe, respectively [109,112,113]. This arises from stronger ferromagnetic coupling within the layers compared to the weak antiferromagnetic coupling between them, and led to much of the early interest in these materials, as summarized in [114] and references therein.…”

“…This magnetic structure is shown in Figure 6, and contains ferromagnetic intralayer order and antiferromagnetic stacking. The chloride orders below 24 K and has an ordered moment of 4.5 µ B [108], and the bromide orders below 14 K and has an ordered moment of 3.9 µ B [108,109]. The iodide adopts a different low temperature structure below its Néel temperature of 9 K, with two-atom-wide ferromagnetic stipes in the plane (ordered moment of 3.7 µ B ) that are aligned antiferromagnetically with neighboring stripes [54].…”

Off-diagonal exchange-induced transverse and field-induced spin-flop order in the diluted metamagnet Fe 0.85 Mg 0.15 Br 2

“…Both of them meet in a multicritical point (MCP) at T m = 4.6 K, below which H c (T ) becomes first-order [3]. Later on, a first-order phase line H 1 (T ) was additionally discovered in the vicinity of H − (T ) by means of specific-heat measurements [4].…”

Cooperative Properties of Metamagnetic Materials.

“…82 Another s p e c i a l f e a t u r e of the FeBr 2 phase b oundary is that it has a maximum , which implies that the ordered phase cojld be entered Iro n the paramagnetic phase by increasing the temperature at constan t i n t e rn a l magnetic f i e l d . 82 The third marked difference wi th FeCl it is difficult to obtain the phase boundary near the tricritical point by magnetization measurements alone .…”

“…148. 82 . Magnetic phases of EuSe as a function of tençerature and internal magnetic fie ld , as derived from magnetization and dilat ometric measurements .…”