Optical data storage does not require expensive magnetic materials as synthetic alternatives work just as well.
This is the finding of an international team from York, Berlin and Nijmegen, published Thursday February 27 in Applied Physics Letters. The team’s discovery brings the much cheaper method for storing data using light a step closer. It was Professor Rasing, physicist at Radboud University Nijmegen and FOM workgroup leader, who came up with the new synthetic material.
When you store a file on your laptop or PC, the computer creates a code consisting of zeros and ones. These are actually tiny magnetic poles (spins) that can point in one of two directions: the ‘zero’ state or the ‘one’ state. Switching these spins using a magnetic field is a relatively slow, energy-intensive process. An alternative is to switch them using light, which was first achieved by Radboud researchers six years ago. They have been searching for suitable materials ever since. Theo Rasing: ‘Optical switching is only possible in special magnets, called ferrimagnets. However, these magnets are made of expensive rare earth metals, which are also difficult to produce at the nano-scale. Now, we have shown for the first time that it is also possible to switch synthetic ferrimagnets optically.’
Ferrimagnets have the unusual property that the spins are not all of the same magnitude. ‘They are similar to anti-ferromagnets, in which the spins are found in pairs with opposite directions. However, because the magnetic poles have different magnitudes, ferrimagnets have a net magnetic moment,’ explains Rasing. This can be simulated by anti-ferromagnetically coupling thin layers of iron with a spacer layer. ‘The iron is ferromagnetic – all the spins have the same magnitude and direction. It is therefore possible to create a net magnetic moment by combining two layers of different thicknesses and opposing magnetisation directions, for example. Coupling the spins works in a very similar manner, in the same two-step process that we previously developed for the normal ferrimagnets.’
Other than with normal ferrimagnets, the production of synthetic ferrimagnets does not require the use of rare earth metals. This makes them cheaper and better for the environment, and therefore more suitable for use in computers. Rasing: ‘I really believe that this is the start of a fundamentally new form of data storage, and possibly data processing too.’
The Latest on: Cheap data storage
[google_news title=”” keyword=”Cheap data storage” num_posts=”10″ blurb_length=”0″ show_thumb=”left”]
via Google News
The Latest on: Cheap data storage
- 12 best cheap phones that prove budget smartphones aren’t rubbishon March 1, 2024 at 1:28 am
Poco is a sub-brand of budget phones from Xiaomi, and the Poco C65 is the cheapest one the Chinese brand sells. For less than the price of a few months of a new iPhone contract, you get a basic ...
- What's the cheapest way to get solar panels installed… and is it only worth doing on a south facing roof?on February 29, 2024 at 10:00 pm
In fact, while the most effective positioning of solar panels is at a 41-degree slope on an unshaded south-facing roof, Duncan said south-west and a south-east facing roofs will only lose around 15 ...
- A.I. Frenzy Complicates Efforts to Keep Power-Hungry Data Sites Greenon February 29, 2024 at 8:55 am
Artificial intelligence’s booming growth is radically reshaping an already red-hot data center market, raising questions about whether these sites can be operated sustainably.
- Scientists unveil DVD-like disc that can hold 4,000 times more data than a Blu-Rayon February 29, 2024 at 6:46 am
A team of researchers created a new type of disc capable of storing hundreds of thousands of gigabytes of data, or more than 40,000 DVDs.
- From cheap universal storage to high-speed data transfers, these flash drives get the job done for meon February 29, 2024 at 2:55 am
They may not be exciting or as crucial as they once were, but USB flash drives are still an important tool used by millions all over the world. There are several companies known for creating quality, ...
- Best Chromebook deals and prices in February 2024on February 27, 2024 at 8:59 am
Yes, the reversible power-charging data-transfer port ... and 32GB of EMMc storage. It's great for in-home learning. As more kids continue in-home learning, cheap laptops have become harder ...
- The US uses cheap gas to win the industrial battleon February 26, 2024 at 5:52 am
The low cost of energy in the country is a great asset when it comes to attracting manufacturing interest. Germany no longer has Russia’s pipeline, which makes industrial activity more expensive ...
- 3 Cheap Industrial IoT Stocks Set to Rally 300% in 2024on February 24, 2024 at 6:59 am
Now, PEGA certainly isn’t cheap, trading at 3.6x forward sales ... Fastly gives developers the tools to push computer and data storage resources all the way to the edge, closer than ever to end users.
- This DVD-sized disk can store a massive 125,000 gigabytes of dataon February 22, 2024 at 8:00 am
Using a 54-nanometer laser, the team managed to record a 100 layers of data onto an optical disk, with each tier separated by just 1 micrometer. The final result is an optical disk with a ...
- The Best Free Online Cloud Storage Platforms in 2024on February 21, 2024 at 4:00 pm
New customers to Rakuten Drive can grab a very generous 10GB of storage for free, right out of the gate, and while it's ongoing paid for subscription service isn't as cheap as some of the others on ...
via Bing News