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Title: Programmable bias field observed in graded ferromagnetic semiconductor films with broken symmetry

Journal Article · · Physical Review Materials
 [1];  [1];  [2];  [3];  [4];  [4];  [3];  [5];  [3];  [3]
  1. Univ. of Notre Dame, IN (United States); Argonne National Lab. (ANL), Argonne, IL (United States); Nanjing Univ. (China)
  2. Univ. of Notre Dame, IN (United States); Korea Univ., Seoul (Korea, Republic of)
  3. Univ. of Notre Dame, IN (United States)
  4. Argonne National Lab. (ANL), Argonne, IL (United States)
  5. Korea Univ., Seoul (Korea, Republic of)

We report on the observation of a field-induced magnetic bias effect in a Ga0.94Mn0.06As1-yPy thin film with digitally graded phosphorus content. Although phosphorus concentration in the sample is changed in steps from y approximate to 0.03 to y approximate to 0.28, the magnetometry and magnetotransport data display a coherent magnetic response typical for single-layer in-plane magnetized films with cubic and weak [110] uniaxial anisotropy. Unexpectedly, low-temperature planar Hall resistance loops exhibit remarkable asymmetry tunable by application of strong in-plane initial magnetic field HIni. We discuss this unusual memory effect, resembling the magnetization asymmetry in the exchange biased magnetic bilayers, in terms of a unidirectional bias field Hb induced by HIni. We show that such bias field defines the delayed or accelerated nucleation of domains with chiral domain walls performing the magnetization reversal.

Research Organization:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Organization:
National Science Foundation (NSF); National Natural Science Foundation of China (NSFC); National Key Research and Development Program of China; National Research Foundation of Korea (NRF); Ministry of Science, Information and Communications Technology (ICT) and Future Planning of Korea; USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1559286
Alternate ID(s):
OSTI ID: 1546486
Journal Information:
Physical Review Materials, Vol. 3, Issue 7; ISSN 2475-9953
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 4 works
Citation information provided by
Web of Science

References (41)

Ferromagnetic resonance and spin-wave resonances in GaMnAsP films journal May 2018
Adjustable anisotropy in ferromagnetic (Ga,Mn) (As,P) layered alloys journal January 2010
Magnetic switching and in‐plane uniaxial anisotropy in ultrathin Ag/Fe/Ag(100) epitaxial films journal December 1995
Chiral spin torque at magnetic domain walls journal June 2013
Dynamics of Dzyaloshinskii domain walls in ultrathin magnetic films journal December 2012
Spin-dependent phenomena and device concepts explored in (Ga,Mn)As journal July 2014
Exchange anisotropy — a review journal October 1999
Electric-field control of the magnetic anisotropy in an ultrathin (Ga,Mn)As/(Ga,Mn)(As,P) bilayer journal March 2013
Dependence of ferromagnetic properties on phosphorus concentration in Ga 1- x Mn x As 1- y P y
  • Li, Xiang; Liu, Xinyu; Dong, Sining
  • Journal of Vacuum Science & Technology B, Nanotechnology and Microelectronics: Materials, Processing, Measurement, and Phenomena, Vol. 36, Issue 2 https://doi.org/10.1116/1.5014055
journal March 2018
Spin Hall effects journal October 2015
Recent progress in III-V based ferromagnetic semiconductors: Band structure, Fermi level, and tunneling transport journal March 2014
Manipulation of magnetization in GaMnAs films by spin-orbit-induced magnetic fields journal May 2017
Strain control of the magnetic anisotropy in (Ga,Mn) (As,P) ferromagnetic semiconductor layers journal July 2008
Stable Multidomain Structures Formed in the Process of Magnetization Reversal in GaMnAs Ferromagnetic Semiconductor Thin Films journal January 2007
Uniaxial stress control of skyrmion phase journal October 2015
Extreme asymmetry of Néel domain walls in multilayered films of the dilute magnetic semiconductor (Ga,Mn)(As,P) journal November 2018
Exchange bias journal February 1999
Investigation of domain pinning fields in ferromagnetic GaMnAs films using angular dependence of the planar Hall effect journal January 2010
Asymmetric magnetic domain-wall motion by the Dzyaloshinskii-Moriya interaction journal December 2013
Multiferroics: a magnetic twist for ferroelectricity journal January 2007
Observation of Skyrmions in a Multiferroic Material journal April 2012
Electron paramagnetic resonance in Cd 1 x Mn x S, Cd 1 x Mn x Se, and Cd 1 x Mn x Te journal June 1988
Temperature Behavior of Uniaxial Anisotropy along [100] Direction in GaMnAs Films journal January 2013
Current Driven Magnetization Dynamics in Ferromagnetic Nanowires with a Dzyaloshinskii-Moriya Interaction journal October 2010
Determination of current-induced spin-orbit effective magnetic field in GaMnAs ferromagnetic semiconductor journal December 2017
Giant Planar Hall Effect in Epitaxial (Ga,Mn)As Devices journal March 2003
Asymmetric Hysteresis for Probing Dzyaloshinskii–Moriya Interaction journal June 2016
Evidence for reversible control of magnetization in a ferromagnetic material by means of spin–orbit magnetic field journal August 2009
Semiconductor spintronics journal August 2007
Inversion-symmetry breaking in the noncollinear magnetic phase of the triangular-lattice antiferromagnet Cu Fe O 2 journal June 2006
Control of magnetism by electric fields journal March 2015
First-principles calculations on magnetism and exchange interactions in GaMnAs and GaMnAsP: Magnetism and exchange interactions in GaMnAs and GaMnAsP journal July 2017
Dilute ferromagnetic semiconductors: Physics and spintronic structures journal March 2014
Semiconductor Spintronics text January 2007
Strain-Control of the magnetic anisotropy in (Ga,Mn)(As,P) ferromagnetic semiconductor layers text January 2008
Evidence for reversible control of magnetization in a ferromagnetic material via spin-orbit magnetic field text January 2008
Current driven magnetization dynamics in ferromagnetic nanowires with Dzyaloshinskii-Moriya interaction text January 2009
Dynamics of Dzyaloshinskii domain walls in ultrathin magnetic films text January 2012
Exchange Bias driven by Dzyaloshinskii-Moriya interactions text January 2013
Asymmetric Magnetic Domain-Wall Motion by the Dzyaloshinskii-Moriya Interaction text January 2013
Recent Progress in III-V based ferromagnetic semiconductors: Band structure, Fermi level, and tunneling transport text January 2013

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