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From: Jeroen Belleman <jeroen@nospam.please>
Newsgroups: sci.electronics.design
Subject: Re: Proof of principle demonstration of 3-D magnetic recording
Date: Tue, 9 Apr 2024 10:07:12 +0200
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On 4/9/24 09:49, Jan Panteltje wrote:
> On a sunny day (Tue, 9 Apr 2024 09:19:46 +0200) it happened Arie de Muijnck
> <noreply@ademu.com> wrote in <nnd$16a4abad$09e25412@0ec9ca3c539ad932>:
> 
>> On 2024-04-09 06:42, Jan Panteltje wrote:
>>> Proof-of-principle demonstration of 3-D magnetic recording
>>> Possibility of ultra-high density hard disk drives with areal densities exceeding 10 Tbit/in² using multi-level magnetic
>>> recording
>>>    https://www.sciencedaily.com/releases/2024/04/240408130543.htm
>>>
>>> Picture of layers:
>>>    https://www.nims.go.jp/eng/news/press/2024/03/202403270.html
>>>
>>
>> Great idea for recording.
>> Now we just have to invent a reading system...
>>
>> Arie
>>
> 
> correlation of 2 magnetic sensors pointing down in an angle?
> 
> MS1 MS  MS2
>   \  \/  /
> =========== top layer
>     \  /
>      \/
> =========== second layer
> 
> Use fixed font.
> 
> Have not tried it...

They seem to have three distinguishable levels of magnetization,
so about 1.5 bits per cell.

Jeroen Belleman