🧲 The Magnetic Diode - A New Kind of Magnetic Control
One-Way Flux, No Power Required
The Magnetic Diode isn’t just a clever coil or core tweak. It doesn’t use sensors. It doesn’t rely on powered switching or exotic materials. Instead, it reshapes how magnetic flux behaves — allowing it to flow in one direction, while resisting it in the other. It's passive. It's directional. And it changes how we think about magnetic design.
This is not a refinement of old ideas. It's a fundamentally new tool in the magnetic engineer’s kit — a way to create asymmetry in what was once an always symmetrical field.
The Magnetic Diode is built on the same core principles as our FMG and FMM: flux steering. By shaping the magnetic circuit it creates a path that guides magnetic flux forward while choking off reverse flow. The result? A passive, no-power-required device that does for magnetic fields what an electrical diode does for current.
It opens the door to smarter and more efficient motors, cleaner signal sensing, magneto-logic switching systems, magneto-restrictive cooling systems and passive energy gating systems - and much, much more
🧠 5 Next-Gen Applications for Magnetic Diodes
The magnetic diode is more than a passive component — it’s a foundational technology for directional magnetic control. And in emerging fields, that’s a game-changer.
1. 🧲 Magneto-Logic Switching
Magnetic diodes enable one-way control of flux pathways, allowing the creation of binary logic gates based on magnetic state rather than electric charge.
Why it matters: Opens the door to ultra-durable, radiation-hardened logic systems that operate without electrons — ideal for extreme environments or secure hardware.
2. ❄️ Magneto-Restrictive Cooling Systems
By enabling directional magnetic field flow, magnetic diodes can regulate heat-exchange cycles in magnetocaloric refrigeration systems — a rising alternative to vapor compression cooling.
Why it matters: Supports solid-state, compressor-free cooling that is quieter, greener, and more compact.
3. 🪶 Nano-Scale Energy Harvesting for IoT
Magnetic diodes make it possible to selectively route environmental magnetic noise or motion-induced fields into tiny coils or harvesting circuits — ideal for IoT nodes and wireless sensors.
Why it matters: Enables self-powered micro-devices for remote monitoring, smart infrastructure, and wearable tech — no battery swaps required.
4. 🔐 Magnetic Polarity Filters for Secure Systems
By filtering magnetic flux based on direction, magnetic diodes can serve as physical-layer security features, allowing only specific field orientations to trigger access or response.
Why it matters: Builds hardware-level security into locks, tags, and authentication systems — with no electronics to hack.
5. ⚡ Passive Field Modulation in Ultra-Low-Power Devices
When embedded in motionless systems, magnetic diodes allow magnetic fields to be shaped, gated, or pulsed without needing traditional switching — perfect for high-efficiency magnetic modulators.
Why it matters: Forms the backbone of next-gen passive logic, sensors, and energy routers for off-grid, autonomous systems.
In short:
The magnetic diode isn’t just a better component — it’s a platform technology for magnetic control at every scale. From smart materials to ambient power, it’s enabling the future of electronics — without the electricity.
👨🔧 How This One Started...
and where it's at
To be honest, in developing the FMG, we realised we had invented an active Magnetic Diode, i.e. a powered system that gave virtually complete diode action FWD:REV... but we thought there was more potential for a passive, unpowered unit.
Our confidence was bigger than out telent, and it proved harder then we thought, but as of now we have a 30:1 FWD:REV ratio passive unit.
As much as we love "tinkering" we realised we weren't getting much else done, so we have left it there for now... while we concentrate on the FMG.