Abstract Observations of high ferric iron content in diamond garnet inclusions and mantle plume melts suggest a highly heterogeneous distribution the mantle. Recycling oxidized materials such as carbonates from Earth’s surface by subduction could explain observed variations. Here we present high-pressure high-temperature multi-anvil experiments to determine redox reactions between calcium-, mag...

We report on our progress towards the integration of nonreciprocal optical elements in, for example, an integrated optical waveguide isolator on conventional semiconductor photonic platforms. Our approach uses an evanescent interaction with a magneto-optic iron garnet upper cladding. Specifically, ceriumand bismuthsubstituted yttrium and terbium iron garnets were investigated. Device fabricatio...

We characterize magnetic-field sensors based on the Faraday effect in ferrimagnetic iron garnets in terms of their sensitivity, speed, and directionality. Signal-to-noise measurements at 80 Hz on small (typically 5 mm diameter x 3 mm long) samples of yttrium iron garnet (YIG) yield noise equivalent magnetic fields of 10 nT /.JHz. Frequen~y response measurements exhibit virtually flat response t...

We report on magnetization dynamics triggered in a Co/garnet heterostructure by femtosecond laser pulses. Although laser excitation of a bare Co-doped yttrium iron garnet leads to magnetization precession, the phase of which strongly depends on the linear polarization of the light pulses, the deposition of an ultrathin Co layer on a top of a garnet film results in substantial changes of the las...

We prepare highly Bismuth substituted iron garnet of composition type Bi1.8Lu1.2Fe3.6Al1.4O12 by using low and high substrate temperatures (250 °C and 680 °C) during the deposition process inside the vacuum chamber of RF magnetron sputtering system. The crystallization process of this garnet type thin film materials are performed by means of optimized high temperature oven annealing process and...

We have studied the effects of placing Co/Pt multilayers on dysprosium-iron-garnet doped with bismuth and aluminum. The garnet was deposited by RF-magnetron sputtering and crystallized by rapid thermal annealing. The Co/Pt multilayers were then deposited by DC-magnetron sputtering. The garnet thickness was held constant at lOOOA while the ColPt multilayer had the form of [3ACo/9APt], with n ran...

Rare-earth iron garnet thin films with perpendicular magnetic anisotropy (PMA) have recently attracted a great deal of attention for spintronics applications. Bismuth substituted garnets are particularly popular among these various because Bi3+ larger ion radius can adjust the lattice constant, strain state, and PMA films. In this paper, Tm2BiFe5O12 (TmBiIG) Y2BiFe5O12 (YBiIG) series thicknesse...