Switching of Co Magnetization Driven by Antiferromagnetic-Ferromagnetic Phase Transition of FeRh Alloy in 
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>Co</mml:mi><mml:mrow><mml:mo>/</mml:mo><mml:mi>FeRh</mml:mi></mml:mrow></mml:mrow></mml:math>
 Bilayers

Dróżdż, P.; Ślęzak, M.; Matlak, K.; Matlak, B.; Freindl, K.; Wilgocka-Ślęzak, D.; Spiridis, N.; Korecki, J.; Ślęzak, T.

doi:10.1103/physrevapplied.9.034030

Cited by 15 publications

(6 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…While bulk FeRh is prohibitively expensive, Fe-Rh may find use in caloric thin-film 19,21,36,44,[62][63][64][65][66][67][68][69][70] and nanoscale devices. 43,59,[71][72][73][74][75][76][77][78][79] Nonetheless, and notably here, it mainly serves as a well-studied but suitably complex system to test methods for reliability in thermodynamic assessments and prediction of caloric properties, specifically because it exhibits instabilities from anharmonic atomic motion, which affects caloric behavior.…”

Section: Introductionmentioning

confidence: 99%

Reliable thermodynamic estimators for screening caloric materials

Zarkevich

Johnson

2019

Journal of Alloys and Compounds

View full text Add to dashboard Cite

Reversible, diffusionless, first-order solid-solid phase transitions accompanied by caloric effects are critical for applications in the solid-state cooling and heat-pumping devices. Accelerated discovery of caloric materials requires reliable but faster estimators for predictions and high-throughput screening of system-specific dominant caloric contributions. We assess reliability of the computational methods that provide thermodynamic properties in relevant solid phases at or near a phase transition. We test the methods using the well-studied B2 FeRh alloy as a "fruit fly" in such a materials genome discovery, as it exhibits a metamagnetic transition which generates multicaloric (magneto-, elasto-, and baro-caloric) responses. For lattice entropy contributions, we find that the commonly-used linear-response and smalldisplacement phonon methods are invalid near instabilities that arise from the anharmonicity of atomic potentials, and we offer a more reliable and precise method for calculating lattice entropy at a fixed temperature. Then, we apply a set of reliable methods and estimators to the metamagnetic transition in FeRh (predicted 346 ± 12 K, observed 353 ± 1 K) and calculate the associated caloric properties, such as isothermal entropy and isentropic temperature changes.

show abstract

Section: Introductionmentioning

confidence: 99%

Reliable thermodynamic estimators for screening caloric materials

Zarkevich

Johnson

2019

Journal of Alloys and Compounds

View full text Add to dashboard Cite

show abstract

“…[10] Miniaturizing the sensor therefore makes it possible to achieve higher magnetic sensitivity. [11] Ferromagnetic films are deposited through molecular beam epitaxy, [12] chemical vapor deposition, [13] sputtering, [14] or atomic layer deposition [15] to form highquality metallic layers. Although their film qualities are excellent, patterning is not easy.…”

Section: Introductionmentioning

confidence: 99%

Electroplated FePt Films for Micromechanical Magnetic Sensors

Toda

Ono

2021

Physica Status Solidi (a)

View full text Add to dashboard Cite

Herein, a ferromagnetic iron–platinum (FePt) film is deposited on a Si resonator by electroplating and patterned to form a magnetic sensor. The electroplating and annealing conditions of the FePt film are optimized to achieve micromachining with lower manufacturing costs than other deposition methods. The atomic ratio of electroplated Fe to Pt is nearly 1, which is controlled by a potential of −0.75 ± 0.02 V in a standard three‐electrode electroplating system. Hydrogen annealing is performed at 750 °C, yielding an Fe‐to‐Pt atomic ratio of nearly 1 and achieving a coercivity of 0.3 T, which are measured using a vibrating sample magnetometer. The electroplated FePt film is patterned using the lift‐off method, and the cantilever is fabricated through a standard micromachining process using a silicon‐on‐insulator wafer. The miniature Si resonator with the magnetized FePt film has a minimum detectable magnetic field of 20 nT. Such patterned magnets on resonators can be used for localized magnetic field detection with a magnetic moment sensitivity of ≈105μB.

show abstract

“…The magnetization direction can also be controlled by magnetic coupling with another magnetic film as described in the literature 20 , 21 . Recently, we showed that the in-plane SRT process of ultrathin Co film magnetization can be induced by the proximity of the epitaxial FeRh layer, as a result of the evolution of direct exchange coupling between the FeRh and Co spin systems accompanying the temperature-driven AFM ⇔ FM magneto-structural phase transition in the FeRh layer 22 .…”

Section: Introductionmentioning

confidence: 99%

“…However, for the FM state of FeRh (FeRh FM ) that can be induced by heating across the AFM ⇔ FM phase transition the FeAu and FeRh FM layers are ferromagnetically coupled with in-plane magnetizations. The polar SRT process of the FeAu spins displays the major features of a magnetic phase transition in the FeRh; namely, it is reversible and hysteretic 22 , 25 . The phenomenon reported here goes beyond the heat-assisted magnetic recording (HAMR) concept consisting of temperature modulation of the coercivity 26 , 27 .…”

Section: Introductionmentioning

confidence: 99%

Driving the polar spin reorientation transition of ultrathin ferromagnets with antiferromagnetic–ferromagnetic phase transition of nearby FeRh alloy film

Dróżdż

Ślęzak

Janus

et al. 2020

Sci Rep

Self Cite

View full text Add to dashboard Cite

We show that in-plane to out-of-plane magnetization switching of a ferromagnetic layer can be driven by antiferromagnetic–ferromagnetic phase transition in a nearby FeRh system. For FeRh/Au/FeAu trilayers, the impact of the magnetic phase transition of FeRh onto the perpendicular magnetization of monoatomic FeAu superlattices is transferred across the Au spacer layer via interlayer magnetic coupling. The polar spin reorientation process of the FeAu spins driven by the magnetic phase transition in the FeRh reveals its major features; namely it is reversible and displays hysteresis.

show abstract

Switching of Co Magnetization Driven by Antiferromagnetic-Ferromagnetic Phase Transition of FeRh Alloy in Co/FeRh Bilayers

Cited by 15 publications

References 25 publications

Reliable thermodynamic estimators for screening caloric materials

Reliable thermodynamic estimators for screening caloric materials

Electroplated FePt Films for Micromechanical Magnetic Sensors

Driving the polar spin reorientation transition of ultrathin ferromagnets with antiferromagnetic–ferromagnetic phase transition of nearby FeRh alloy film

Contact Info

Product

Resources

About