A future ultraminiature computer the size of a pinhead?

From Kurzweilai.net (Apr. 16):

University of New Hampshire researchers have discovered a combination of materials that they say would allow for smaller, safer magnetic random access memory (MRAM) storage — ultimately leading to ultraminiature computers.

Unlike conventional RAM (read-only memory) SRAM and DRAM chip technologies, with MRAM, data is stored by magnetic storage elements, instead of energy-expending electric charge or current flows. MRAM is also nonvolatile memory (the data is preserved when the power if turned off). The elements are formed from two ferromagnetic plates, each of which can hold a magnetization, separated by a thin insulating layer.

In their study, published March 30, 2018 in the open-access journal Science Advances, the researchers describe a new design* comprising ultrathin films, known as Fe (iron) monolayers, grown on a substrate made up of non-magnetic substances —  boron, gallium, aluminum, or indium nitride.

Ultrahigh storage density

The new design has an estimated 10-year data retention at room temperature. It can “ultimately lead to nanomagnetism and promote revolutionary ultrahigh storage density in the future,” said Jiadong Zang, an assistant professor of physics and senior author. “It opens the door to possibilities for much smaller computers for everything from basic data storage to traveling on space missions. Imagine launching a rocket with a computer the size of a pin head — it not only saves space but also a lot of fuel.”

MRAM is already challenging flash memory in a number of applications where persistent or nonvolatile memory (such as flash) is currently being used, and it’s also taking on RAM chips “in applications such as AI, IoT, 5G, and data centers,” according to a recent article in Electronic Design.**

Source: “A future ultraminiature computer the size of a pinhead?”