QuantumATK Forum

QuantumATK => General Questions and Answers => Topic started by: blessingmeshach on February 17, 2011, 09:20

Title: Converging Magntic Tunneling Junction
Post by: blessingmeshach on February 17, 2011, 09:20

Hi,
I tried simulating Magnetic Tunneling Junction with the specifications: Fe '6' layers for both right and left electrodes, MgO '2' layers and Global repetition along A as '2' and I get the following error..

Traceback (most recent call last):
  File "c:/users/vinod/appdata/local/temp/tmpjdzrah.nl", line 601, in ?
    runtime_parameters = runtime_parameters
ATKError: bad allocation
Terminated Abnormally

I've attached both the scripts and log output here... Can somebody please help me to rectify this problem...
Can I increase the global repetition more than '2'...

Title: Re: Converging Magntic Tunneling Junction
Post by: Anders Blom on February 17, 2011, 09:39

Bad allocation means that you have run out of memory, the system is too large to be simulated on your computer. How much RAM do you have?

Title: Re: Converging Magntic Tunneling Junction
Post by: blessingmeshach on February 17, 2011, 10:58

Thanks for the reply...

I have 3 Gb RAM.. When I create Magnetic Tunneling Junction with specifications: '4' layers Fe - both right & left electrodes, '2' layers MgO - non-magnetic spacer, and global repetition along A - '2', the system converges. When I plot I-V curve, I get current in the range of micro-ampere..

Is it possible 2 get current in mill-ampere range...

Title: Re: Converging Magntic Tunneling Junction
Post by: Anders Blom on February 17, 2011, 11:04

Why would you want that? If you want a larger current you should probably invent a new spacer material :)