Magnetic control of anomalous hall effect induced by spin chirality

Jun 29, 2011 By Mikiko Tanifuji

Institute for Solid State Physics, the University of Tokyo and RIKEN announced that researchers from both institutes succeeded in the magnetic control of anomalous Hall effect (AHE) induced by spin chirality. Details were published in Physical Review Letters.

Since spin chirality (solid angle formed by spin) is accompanied with a strong virtual magnetic field, AHE is observed without applying field. Such large Hall voltages under weak magnetic fields may lead to a promising nonvolatile memory with reduced power dissipation because of the absence of hysteresis loss.

In the present work, AHE of the chiral spin states of Pr2Ir2O7 was found to appear below 1.5 K at a zero magnetic field with hysteresis most pronounced for fields cycled along the [111] direction. A large positive magnetoresisitance was also observed only for fields along the [111] direction. These observa-tions suggest the reconstruction of the of the conduction electrons by the field-induced spin texture.

The present results, the authors of the paper expect, may provide a mean to control magnetically the AHE induced by spin chirality, which might be a step toward based on the AHE.

Explore further: Boron-based atomic clusters mimic rare-earth metals

More information: L. Balicas, et al, "Anisotropic Hysteretic Hall Effect and Magnetic Control of Chiral Domains in the Chiral Spin States of Pr2Ir2O7", Physical Review Letters, Vol. 106, No. 21, p. 217204 (2011) [4 pages] Published May 26, 2010.

Related Stories

Spin-polarized electrons on demand

Jan 15, 2009

Many hopes are pinned on spintronics. In the future it could replace electronics, which in the race to produce increasingly rapid computer components, must at sometime reach its limits. Different from electronics, where whole ...

Spin-polarized electrons on demand

Jan 21, 2009

Many hopes are pinned on spintronics. In the future it could replace electronics, which in the race to produce increasingly rapid computer components, must at sometime reach its limits. Different from electronics, where whole ...

Recommended for you

Boron-based atomic clusters mimic rare-earth metals

22 hours ago

Rare Earth elements, found in the f-block of the periodic table, have particular magnetic and optical properties that make them valuable commodities. This has been particularly true over the last thirty years ...

Accurately counting ions from laboratory radiation exposure

Apr 15, 2015

Thermoluminescence is used extensively in archaeology and the earth sciences to date artifacts and rocks. When exposed to radiation, quartz emits light proportional to the energy it absorbs. Replicating the very low dose ...

User comments : 0

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.